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Finding the Fourth Proportional to 21,589.92, 29,792.95 and 12,157.88

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Solution

The fourth proportional to 21,589.92, 29,792.95 and 12,157.88 is: 16,777.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,589.92 : 29,792.95 = 12,157.88 : x
  2. Step 2: Convert to fraction form
    21,589.92/29,792.95 = 12,157.88/x
  3. Step 3: Cross multiply
    21,589.92x = 29,792.95 × 12,157.88
  4. Step 4: Simplify right side
    21,589.92x = 362,218,931.59
  5. Step 5: Solve for x
    x = 362,218,931.59/21,589.92
  6. Step 6: Final answer
    x = 16,777.22

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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.