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Finding the Fourth Proportional to 8,539.80, 12,809.70 and 5,587.35

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Solution

The fourth proportional to 8,539.80, 12,809.70 and 5,587.35 is: 8,381.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,539.80 : 12,809.70 = 5,587.35 : x
  2. Step 2: Convert to fraction form
    8,539.80/12,809.70 = 5,587.35/x
  3. Step 3: Cross multiply
    8,539.80x = 12,809.70 × 5,587.35
  4. Step 4: Simplify right side
    8,539.80x = 71,572,277.30
  5. Step 5: Solve for x
    x = 71,572,277.30/8,539.80
  6. Step 6: Final answer
    x = 8,381.03

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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.