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Finding the Fourth Proportional to 8,478.76, 11,700.67 and 4,701.83

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Solution

The fourth proportional to 8,478.76, 11,700.67 and 4,701.83 is: 6,488.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.76 : 11,700.67 = 4,701.83 : x
  2. Step 2: Convert to fraction form
    8,478.76/11,700.67 = 4,701.83/x
  3. Step 3: Cross multiply
    8,478.76x = 11,700.67 × 4,701.83
  4. Step 4: Simplify right side
    8,478.76x = 55,014,561.23
  5. Step 5: Solve for x
    x = 55,014,561.23/8,478.76
  6. Step 6: Final answer
    x = 6,488.51

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Half scale
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Double scale
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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.