Home / 8,521.08-12,781.98-3,840.24

Finding the Fourth Proportional to 8,521.08, 12,781.98 and 3,840.24

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Solution

The fourth proportional to 8,521.08, 12,781.98 and 3,840.24 is: 5,760.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,521.08 : 12,781.98 = 3,840.24 : x
  2. Step 2: Convert to fraction form
    8,521.08/12,781.98 = 3,840.24/x
  3. Step 3: Cross multiply
    8,521.08x = 12,781.98 × 3,840.24
  4. Step 4: Simplify right side
    8,521.08x = 49,085,870.88
  5. Step 5: Solve for x
    x = 49,085,870.88/8,521.08
  6. Step 6: Final answer
    x = 5,760.52

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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.