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Finding the Fourth Proportional to 7,959.50, 10,985.13 and 4,815.71

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Solution

The fourth proportional to 7,959.50, 10,985.13 and 4,815.71 is: 6,646.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.50 : 10,985.13 = 4,815.71 : x
  2. Step 2: Convert to fraction form
    7,959.50/10,985.13 = 4,815.71/x
  3. Step 3: Cross multiply
    7,959.50x = 10,985.13 × 4,815.71
  4. Step 4: Simplify right side
    7,959.50x = 52,901,176.31
  5. Step 5: Solve for x
    x = 52,901,176.31/7,959.50
  6. Step 6: Final answer
    x = 6,646.29

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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.