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Finding the Fourth Proportional to 15,690.13, 21,654.29 and 9,066.13

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Solution

The fourth proportional to 15,690.13, 21,654.29 and 9,066.13 is: 12,512.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.13 : 21,654.29 = 9,066.13 : x
  2. Step 2: Convert to fraction form
    15,690.13/21,654.29 = 9,066.13/x
  3. Step 3: Cross multiply
    15,690.13x = 21,654.29 × 9,066.13
  4. Step 4: Simplify right side
    15,690.13x = 196,320,522.59
  5. Step 5: Solve for x
    x = 196,320,522.59/15,690.13
  6. Step 6: Final answer
    x = 12,512.36

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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.