Home / 25,787.18-38,686.80-8,257.16

Finding the Fourth Proportional to 25,787.18, 38,686.80 and 8,257.16

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Solution

The fourth proportional to 25,787.18, 38,686.80 and 8,257.16 is: 12,387.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,787.18 : 38,686.80 = 8,257.16 : x
  2. Step 2: Convert to fraction form
    25,787.18/38,686.80 = 8,257.16/x
  3. Step 3: Cross multiply
    25,787.18x = 38,686.80 × 8,257.16
  4. Step 4: Simplify right side
    25,787.18x = 319,443,097.49
  5. Step 5: Solve for x
    x = 319,443,097.49/25,787.18
  6. Step 6: Final answer
    x = 12,387.67

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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.