Home / 21,237.71-29,299.87-13,683.47

Finding the Fourth Proportional to 21,237.71, 29,299.87 and 13,683.47

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Solution

The fourth proportional to 21,237.71, 29,299.87 and 13,683.47 is: 18,877.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.71 : 29,299.87 = 13,683.47 : x
  2. Step 2: Convert to fraction form
    21,237.71/29,299.87 = 13,683.47/x
  3. Step 3: Cross multiply
    21,237.71x = 29,299.87 × 13,683.47
  4. Step 4: Simplify right side
    21,237.71x = 400,923,892.15
  5. Step 5: Solve for x
    x = 400,923,892.15/21,237.71
  6. Step 6: Final answer
    x = 18,877.92

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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.