Home / 13,355.59-18,432.09-7,690.57

Finding the Fourth Proportional to 13,355.59, 18,432.09 and 7,690.57

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Solution

The fourth proportional to 13,355.59, 18,432.09 and 7,690.57 is: 10,613.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.59 : 18,432.09 = 7,690.57 : x
  2. Step 2: Convert to fraction form
    13,355.59/18,432.09 = 7,690.57/x
  3. Step 3: Cross multiply
    13,355.59x = 18,432.09 × 7,690.57
  4. Step 4: Simplify right side
    13,355.59x = 141,753,278.39
  5. Step 5: Solve for x
    x = 141,753,278.39/13,355.59
  6. Step 6: Final answer
    x = 10,613.78

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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.