Home / 21,898.26-30,219.63-12,950.19

Finding the Fourth Proportional to 21,898.26, 30,219.63 and 12,950.19

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Solution

The fourth proportional to 21,898.26, 30,219.63 and 12,950.19 is: 17,871.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,898.26 : 30,219.63 = 12,950.19 : x
  2. Step 2: Convert to fraction form
    21,898.26/30,219.63 = 12,950.19/x
  3. Step 3: Cross multiply
    21,898.26x = 30,219.63 × 12,950.19
  4. Step 4: Simplify right side
    21,898.26x = 391,349,950.23
  5. Step 5: Solve for x
    x = 391,349,950.23/21,898.26
  6. Step 6: Final answer
    x = 17,871.28

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Half scale
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Double scale
Find fourth proportional to 21,899.26, 30,221.01 and 12,951.19
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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.