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Finding the Fourth Proportional to 8,985.74, 12,400.29 and 5,006.90

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Solution

The fourth proportional to 8,985.74, 12,400.29 and 5,006.90 is: 6,909.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.74 : 12,400.29 = 5,006.90 : x
  2. Step 2: Convert to fraction form
    8,985.74/12,400.29 = 5,006.90/x
  3. Step 3: Cross multiply
    8,985.74x = 12,400.29 × 5,006.90
  4. Step 4: Simplify right side
    8,985.74x = 62,087,012.00
  5. Step 5: Solve for x
    x = 62,087,012.00/8,985.74
  6. Step 6: Final answer
    x = 6,909.50

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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.