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Finding the Fourth Proportional to 8,672.80, 13,009.20 and 5,562.40

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Solution

The fourth proportional to 8,672.80, 13,009.20 and 5,562.40 is: 8,343.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.80 : 13,009.20 = 5,562.40 : x
  2. Step 2: Convert to fraction form
    8,672.80/13,009.20 = 5,562.40/x
  3. Step 3: Cross multiply
    8,672.80x = 13,009.20 × 5,562.40
  4. Step 4: Simplify right side
    8,672.80x = 72,362,374.08
  5. Step 5: Solve for x
    x = 72,362,374.08/8,672.80
  6. Step 6: Final answer
    x = 8,343.60

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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.