Home / 21,154.32-29,188.32-12,770.64

Finding the Fourth Proportional to 21,154.32, 29,188.32 and 12,770.64

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Solution

The fourth proportional to 21,154.32, 29,188.32 and 12,770.64 is: 17,620.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.32 : 29,188.32 = 12,770.64 : x
  2. Step 2: Convert to fraction form
    21,154.32/29,188.32 = 12,770.64/x
  3. Step 3: Cross multiply
    21,154.32x = 29,188.32 × 12,770.64
  4. Step 4: Simplify right side
    21,154.32x = 372,753,526.92
  5. Step 5: Solve for x
    x = 372,753,526.92/21,154.32
  6. Step 6: Final answer
    x = 17,620.68

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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.