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Finding the Fourth Proportional to 7,160.80, 9,881.20 and 5,672.48

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Solution

The fourth proportional to 7,160.80, 9,881.20 and 5,672.48 is: 7,827.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,160.80 : 9,881.20 = 5,672.48 : x
  2. Step 2: Convert to fraction form
    7,160.80/9,881.20 = 5,672.48/x
  3. Step 3: Cross multiply
    7,160.80x = 9,881.20 × 5,672.48
  4. Step 4: Simplify right side
    7,160.80x = 56,050,909.38
  5. Step 5: Solve for x
    x = 56,050,909.38/7,160.80
  6. Step 6: Final answer
    x = 7,827.46

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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.