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Finding the Fourth Proportional to 16,686.90, 23,020.74 and 9,609.12

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Solution

The fourth proportional to 16,686.90, 23,020.74 and 9,609.12 is: 13,256.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,686.90 : 23,020.74 = 9,609.12 : x
  2. Step 2: Convert to fraction form
    16,686.90/23,020.74 = 9,609.12/x
  3. Step 3: Cross multiply
    16,686.90x = 23,020.74 × 9,609.12
  4. Step 4: Simplify right side
    16,686.90x = 221,209,053.15
  5. Step 5: Solve for x
    x = 221,209,053.15/16,686.90
  6. Step 6: Final answer
    x = 13,256.45

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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.