Home / 21,310.28-29,412.02-13,359.40

Finding the Fourth Proportional to 21,310.28, 29,412.02 and 13,359.40

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Solution

The fourth proportional to 21,310.28, 29,412.02 and 13,359.40 is: 18,438.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.28 : 29,412.02 = 13,359.40 : x
  2. Step 2: Convert to fraction form
    21,310.28/29,412.02 = 13,359.40/x
  3. Step 3: Cross multiply
    21,310.28x = 29,412.02 × 13,359.40
  4. Step 4: Simplify right side
    21,310.28x = 392,926,939.99
  5. Step 5: Solve for x
    x = 392,926,939.99/21,310.28
  6. Step 6: Final answer
    x = 18,438.38

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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.