Home / 12,487.38-18,708.47-7,805.13

Finding the Fourth Proportional to 12,487.38, 18,708.47 and 7,805.13

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Solution

The fourth proportional to 12,487.38, 18,708.47 and 7,805.13 is: 11,693.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.38 : 18,708.47 = 7,805.13 : x
  2. Step 2: Convert to fraction form
    12,487.38/18,708.47 = 7,805.13/x
  3. Step 3: Cross multiply
    12,487.38x = 18,708.47 × 7,805.13
  4. Step 4: Simplify right side
    12,487.38x = 146,022,040.45
  5. Step 5: Solve for x
    x = 146,022,040.45/12,487.38
  6. Step 6: Final answer
    x = 11,693.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.