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Finding the Fourth Proportional to 21,501.68, 29,674.12 and 12,549.76

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Solution

The fourth proportional to 21,501.68, 29,674.12 and 12,549.76 is: 17,319.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,501.68 : 29,674.12 = 12,549.76 : x
  2. Step 2: Convert to fraction form
    21,501.68/29,674.12 = 12,549.76/x
  3. Step 3: Cross multiply
    21,501.68x = 29,674.12 × 12,549.76
  4. Step 4: Simplify right side
    21,501.68x = 372,403,084.21
  5. Step 5: Solve for x
    x = 372,403,084.21/21,501.68
  6. Step 6: Final answer
    x = 17,319.72

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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.