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Finding the Fourth Proportional to 12,599.76, 18,899.80 and 4,391.76

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Solution

The fourth proportional to 12,599.76, 18,899.80 and 4,391.76 is: 6,587.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,599.76 : 18,899.80 = 4,391.76 : x
  2. Step 2: Convert to fraction form
    12,599.76/18,899.80 = 4,391.76/x
  3. Step 3: Cross multiply
    12,599.76x = 18,899.80 × 4,391.76
  4. Step 4: Simplify right side
    12,599.76x = 83,003,385.65
  5. Step 5: Solve for x
    x = 83,003,385.65/12,599.76
  6. Step 6: Final answer
    x = 6,587.70

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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.