Home / 20,688.91-28,549.86-11,257.27

Finding the Fourth Proportional to 20,688.91, 28,549.86 and 11,257.27

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Solution

The fourth proportional to 20,688.91, 28,549.86 and 11,257.27 is: 15,534.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.91 : 28,549.86 = 11,257.27 : x
  2. Step 2: Convert to fraction form
    20,688.91/28,549.86 = 11,257.27/x
  3. Step 3: Cross multiply
    20,688.91x = 28,549.86 × 11,257.27
  4. Step 4: Simplify right side
    20,688.91x = 321,393,482.48
  5. Step 5: Solve for x
    x = 321,393,482.48/20,688.91
  6. Step 6: Final answer
    x = 15,534.58

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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.