Home / 21,087.48-29,099.85-12,135.30

Finding the Fourth Proportional to 21,087.48, 29,099.85 and 12,135.30

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Solution

The fourth proportional to 21,087.48, 29,099.85 and 12,135.30 is: 16,746.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.48 : 29,099.85 = 12,135.30 : x
  2. Step 2: Convert to fraction form
    21,087.48/29,099.85 = 12,135.30/x
  3. Step 3: Cross multiply
    21,087.48x = 29,099.85 × 12,135.30
  4. Step 4: Simplify right side
    21,087.48x = 353,135,409.71
  5. Step 5: Solve for x
    x = 353,135,409.71/21,087.48
  6. Step 6: Final answer
    x = 16,746.21

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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.