Home / 12,587.40-18,869.10-4,687.80

Finding the Fourth Proportional to 12,587.40, 18,869.10 and 4,687.80

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Solution

The fourth proportional to 12,587.40, 18,869.10 and 4,687.80 is: 7,027.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.40 : 18,869.10 = 4,687.80 : x
  2. Step 2: Convert to fraction form
    12,587.40/18,869.10 = 4,687.80/x
  3. Step 3: Cross multiply
    12,587.40x = 18,869.10 × 4,687.80
  4. Step 4: Simplify right side
    12,587.40x = 88,454,566.98
  5. Step 5: Solve for x
    x = 88,454,566.98/12,587.40
  6. Step 6: Final answer
    x = 7,027.23

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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.