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Finding the Fourth Proportional to 8,985.71, 12,400.30 and 5,007.61

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Solution

The fourth proportional to 8,985.71, 12,400.30 and 5,007.61 is: 6,910.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.71 : 12,400.30 = 5,007.61 : x
  2. Step 2: Convert to fraction form
    8,985.71/12,400.30 = 5,007.61/x
  3. Step 3: Cross multiply
    8,985.71x = 12,400.30 × 5,007.61
  4. Step 4: Simplify right side
    8,985.71x = 62,095,866.28
  5. Step 5: Solve for x
    x = 62,095,866.28/8,985.71
  6. Step 6: Final answer
    x = 6,910.51

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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.