Home / 20,612.28-28,440.20-11,657.84

Finding the Fourth Proportional to 20,612.28, 28,440.20 and 11,657.84

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Solution

The fourth proportional to 20,612.28, 28,440.20 and 11,657.84 is: 16,085.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.28 : 28,440.20 = 11,657.84 : x
  2. Step 2: Convert to fraction form
    20,612.28/28,440.20 = 11,657.84/x
  3. Step 3: Cross multiply
    20,612.28x = 28,440.20 × 11,657.84
  4. Step 4: Simplify right side
    20,612.28x = 331,551,301.17
  5. Step 5: Solve for x
    x = 331,551,301.17/20,612.28
  6. Step 6: Final answer
    x = 16,085.13

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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.