Home / 21,087.50-29,105.60-12,140.19

Finding the Fourth Proportional to 21,087.50, 29,105.60 and 12,140.19

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Solution

The fourth proportional to 21,087.50, 29,105.60 and 12,140.19 is: 16,756.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.50 : 29,105.60 = 12,140.19 : x
  2. Step 2: Convert to fraction form
    21,087.50/29,105.60 = 12,140.19/x
  3. Step 3: Cross multiply
    21,087.50x = 29,105.60 × 12,140.19
  4. Step 4: Simplify right side
    21,087.50x = 353,347,453.36
  5. Step 5: Solve for x
    x = 353,347,453.36/21,087.50
  6. Step 6: Final answer
    x = 16,756.26

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Half scale
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Double scale
Find fourth proportional to 21,088.50, 29,106.98 and 12,141.19
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.