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Finding the Fourth Proportional to 6,437.80, 8,886.18 and 4,079.80

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Solution

The fourth proportional to 6,437.80, 8,886.18 and 4,079.80 is: 5,631.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,437.80 : 8,886.18 = 4,079.80 : x
  2. Step 2: Convert to fraction form
    6,437.80/8,886.18 = 4,079.80/x
  3. Step 3: Cross multiply
    6,437.80x = 8,886.18 × 4,079.80
  4. Step 4: Simplify right side
    6,437.80x = 36,253,837.16
  5. Step 5: Solve for x
    x = 36,253,837.16/6,437.80
  6. Step 6: Final answer
    x = 5,631.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.