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Finding the Fourth Proportional to 26,618.81, 39,934.97 and 9,978.89

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Solution

The fourth proportional to 26,618.81, 39,934.97 and 9,978.89 is: 14,970.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,618.81 : 39,934.97 = 9,978.89 : x
  2. Step 2: Convert to fraction form
    26,618.81/39,934.97 = 9,978.89/x
  3. Step 3: Cross multiply
    26,618.81x = 39,934.97 × 9,978.89
  4. Step 4: Simplify right side
    26,618.81x = 398,506,760.15
  5. Step 5: Solve for x
    x = 398,506,760.15/26,618.81
  6. Step 6: Final answer
    x = 14,970.87

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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.