Home / 20,901.59-28,842.29-12,402.25

Finding the Fourth Proportional to 20,901.59, 28,842.29 and 12,402.25

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Solution

The fourth proportional to 20,901.59, 28,842.29 and 12,402.25 is: 17,113.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.59 : 28,842.29 = 12,402.25 : x
  2. Step 2: Convert to fraction form
    20,901.59/28,842.29 = 12,402.25/x
  3. Step 3: Cross multiply
    20,901.59x = 28,842.29 × 12,402.25
  4. Step 4: Simplify right side
    20,901.59x = 357,709,311.70
  5. Step 5: Solve for x
    x = 357,709,311.70/20,901.59
  6. Step 6: Final answer
    x = 17,113.97

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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.