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Finding the Fourth Proportional to 21,652.40, 29,880.68 and 12,700.14

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Solution

The fourth proportional to 21,652.40, 29,880.68 and 12,700.14 is: 17,526.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,652.40 : 29,880.68 = 12,700.14 : x
  2. Step 2: Convert to fraction form
    21,652.40/29,880.68 = 12,700.14/x
  3. Step 3: Cross multiply
    21,652.40x = 29,880.68 × 12,700.14
  4. Step 4: Simplify right side
    21,652.40x = 379,488,755.79
  5. Step 5: Solve for x
    x = 379,488,755.79/21,652.40
  6. Step 6: Final answer
    x = 17,526.41

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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.