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Finding the Fourth Proportional to 8,780.56, 12,117.06 and 5,248.48

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Solution

The fourth proportional to 8,780.56, 12,117.06 and 5,248.48 is: 7,242.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.56 : 12,117.06 = 5,248.48 : x
  2. Step 2: Convert to fraction form
    8,780.56/12,117.06 = 5,248.48/x
  3. Step 3: Cross multiply
    8,780.56x = 12,117.06 × 5,248.48
  4. Step 4: Simplify right side
    8,780.56x = 63,596,147.07
  5. Step 5: Solve for x
    x = 63,596,147.07/8,780.56
  6. Step 6: Final answer
    x = 7,242.83

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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.