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Finding the Fourth Proportional to 8,871.80, 12,242.76 and 5,335.40

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Solution

The fourth proportional to 8,871.80, 12,242.76 and 5,335.40 is: 7,362.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871.80 : 12,242.76 = 5,335.40 : x
  2. Step 2: Convert to fraction form
    8,871.80/12,242.76 = 5,335.40/x
  3. Step 3: Cross multiply
    8,871.80x = 12,242.76 × 5,335.40
  4. Step 4: Simplify right side
    8,871.80x = 65,320,021.70
  5. Step 5: Solve for x
    x = 65,320,021.70/8,871.80
  6. Step 6: Final answer
    x = 7,362.66

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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.