Home / 14,139.10-21,208.65-13,426.30

Finding the Fourth Proportional to 14,139.10, 21,208.65 and 13,426.30

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Solution

The fourth proportional to 14,139.10, 21,208.65 and 13,426.30 is: 20,139.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.10 : 21,208.65 = 13,426.30 : x
  2. Step 2: Convert to fraction form
    14,139.10/21,208.65 = 13,426.30/x
  3. Step 3: Cross multiply
    14,139.10x = 21,208.65 × 13,426.30
  4. Step 4: Simplify right side
    14,139.10x = 284,753,697.50
  5. Step 5: Solve for x
    x = 284,753,697.50/14,139.10
  6. Step 6: Final answer
    x = 20,139.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.