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Finding the Fourth Proportional to 25,921.68, 38,888.68 and 8,391.50

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Solution

The fourth proportional to 25,921.68, 38,888.68 and 8,391.50 is: 12,589.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,921.68 : 38,888.68 = 8,391.50 : x
  2. Step 2: Convert to fraction form
    25,921.68/38,888.68 = 8,391.50/x
  3. Step 3: Cross multiply
    25,921.68x = 38,888.68 × 8,391.50
  4. Step 4: Simplify right side
    25,921.68x = 326,334,358.22
  5. Step 5: Solve for x
    x = 326,334,358.22/25,921.68
  6. Step 6: Final answer
    x = 12,589.24

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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.