Home / 20,688.20-28,549.62-11,256.68

Finding the Fourth Proportional to 20,688.20, 28,549.62 and 11,256.68

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Solution

The fourth proportional to 20,688.20, 28,549.62 and 11,256.68 is: 15,534.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.20 : 28,549.62 = 11,256.68 : x
  2. Step 2: Convert to fraction form
    20,688.20/28,549.62 = 11,256.68/x
  3. Step 3: Cross multiply
    20,688.20x = 28,549.62 × 11,256.68
  4. Step 4: Simplify right side
    20,688.20x = 321,373,936.46
  5. Step 5: Solve for x
    x = 321,373,936.46/20,688.20
  6. Step 6: Final answer
    x = 15,534.17

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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.