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Finding the Fourth Proportional to 25,989.71, 38,984.57 and 8,459.54

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Solution

The fourth proportional to 25,989.71, 38,984.57 and 8,459.54 is: 12,689.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,989.71 : 38,984.57 = 8,459.54 : x
  2. Step 2: Convert to fraction form
    25,989.71/38,984.57 = 8,459.54/x
  3. Step 3: Cross multiply
    25,989.71x = 38,984.57 × 8,459.54
  4. Step 4: Simplify right side
    25,989.71x = 329,791,529.30
  5. Step 5: Solve for x
    x = 329,791,529.30/25,989.71
  6. Step 6: Final answer
    x = 12,689.31

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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.