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Finding the Fourth Proportional to 6,291.80, 9,437.70 and 5,715.80

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Solution

The fourth proportional to 6,291.80, 9,437.70 and 5,715.80 is: 8,573.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,291.80 : 9,437.70 = 5,715.80 : x
  2. Step 2: Convert to fraction form
    6,291.80/9,437.70 = 5,715.80/x
  3. Step 3: Cross multiply
    6,291.80x = 9,437.70 × 5,715.80
  4. Step 4: Simplify right side
    6,291.80x = 53,944,005.66
  5. Step 5: Solve for x
    x = 53,944,005.66/6,291.80
  6. Step 6: Final answer
    x = 8,573.70

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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.