Home / 8,521.60-12,779.88-3,838.90

Finding the Fourth Proportional to 8,521.60, 12,779.88 and 3,838.90

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Solution

The fourth proportional to 8,521.60, 12,779.88 and 3,838.90 is: 5,757.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,521.60 : 12,779.88 = 3,838.90 : x
  2. Step 2: Convert to fraction form
    8,521.60/12,779.88 = 3,838.90/x
  3. Step 3: Cross multiply
    8,521.60x = 12,779.88 × 3,838.90
  4. Step 4: Simplify right side
    8,521.60x = 49,060,681.33
  5. Step 5: Solve for x
    x = 49,060,681.33/8,521.60
  6. Step 6: Final answer
    x = 5,757.21

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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.