Home / 20,612.82-28,432.44-13,807.20

Finding the Fourth Proportional to 20,612.82, 28,432.44 and 13,807.20

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Solution

The fourth proportional to 20,612.82, 28,432.44 and 13,807.20 is: 19,045.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.82 : 28,432.44 = 13,807.20 : x
  2. Step 2: Convert to fraction form
    20,612.82/28,432.44 = 13,807.20/x
  3. Step 3: Cross multiply
    20,612.82x = 28,432.44 × 13,807.20
  4. Step 4: Simplify right side
    20,612.82x = 392,572,385.57
  5. Step 5: Solve for x
    x = 392,572,385.57/20,612.82
  6. Step 6: Final answer
    x = 19,045.06

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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.