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Finding the Fourth Proportional to 8,901.80, 13,352.70 and 8,124.20

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Solution

The fourth proportional to 8,901.80, 13,352.70 and 8,124.20 is: 12,186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,901.80 : 13,352.70 = 8,124.20 : x
  2. Step 2: Convert to fraction form
    8,901.80/13,352.70 = 8,124.20/x
  3. Step 3: Cross multiply
    8,901.80x = 13,352.70 × 8,124.20
  4. Step 4: Simplify right side
    8,901.80x = 108,480,005.34
  5. Step 5: Solve for x
    x = 108,480,005.34/8,901.80
  6. Step 6: Final answer
    x = 12,186.30

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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.