Home / 8,620.32-12,898.80-5,335.20

Finding the Fourth Proportional to 8,620.32, 12,898.80 and 5,335.20

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Solution

The fourth proportional to 8,620.32, 12,898.80 and 5,335.20 is: 7,983.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.32 : 12,898.80 = 5,335.20 : x
  2. Step 2: Convert to fraction form
    8,620.32/12,898.80 = 5,335.20/x
  3. Step 3: Cross multiply
    8,620.32x = 12,898.80 × 5,335.20
  4. Step 4: Simplify right side
    8,620.32x = 68,817,677.76
  5. Step 5: Solve for x
    x = 68,817,677.76/8,620.32
  6. Step 6: Final answer
    x = 7,983.19

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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.