Home / 20,688.56-28,549.36-11,257.16

Finding the Fourth Proportional to 20,688.56, 28,549.36 and 11,257.16

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Solution

The fourth proportional to 20,688.56, 28,549.36 and 11,257.16 is: 15,534.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.56 : 28,549.36 = 11,257.16 : x
  2. Step 2: Convert to fraction form
    20,688.56/28,549.36 = 11,257.16/x
  3. Step 3: Cross multiply
    20,688.56x = 28,549.36 × 11,257.16
  4. Step 4: Simplify right side
    20,688.56x = 321,384,713.42
  5. Step 5: Solve for x
    x = 321,384,713.42/20,688.56
  6. Step 6: Final answer
    x = 15,534.42

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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.