Home / 12,729.25-17,565.57-7,690.49

Finding the Fourth Proportional to 12,729.25, 17,565.57 and 7,690.49

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Solution

The fourth proportional to 12,729.25, 17,565.57 and 7,690.49 is: 10,612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.25 : 17,565.57 = 7,690.49 : x
  2. Step 2: Convert to fraction form
    12,729.25/17,565.57 = 7,690.49/x
  3. Step 3: Cross multiply
    12,729.25x = 17,565.57 × 7,690.49
  4. Step 4: Simplify right side
    12,729.25x = 135,087,801.98
  5. Step 5: Solve for x
    x = 135,087,801.98/12,729.25
  6. Step 6: Final answer
    x = 10,612.40

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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.