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Finding the Fourth Proportional to 8,703.56, 12,010.80 and 4,978.28

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Solution

The fourth proportional to 8,703.56, 12,010.80 and 4,978.28 is: 6,869.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,703.56 : 12,010.80 = 4,978.28 : x
  2. Step 2: Convert to fraction form
    8,703.56/12,010.80 = 4,978.28/x
  3. Step 3: Cross multiply
    8,703.56x = 12,010.80 × 4,978.28
  4. Step 4: Simplify right side
    8,703.56x = 59,793,125.42
  5. Step 5: Solve for x
    x = 59,793,125.42/8,703.56
  6. Step 6: Final answer
    x = 6,869.96

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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.