Home / 8,686.25-11,988.75-4,909.47

Finding the Fourth Proportional to 8,686.25, 11,988.75 and 4,909.47

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Solution

The fourth proportional to 8,686.25, 11,988.75 and 4,909.47 is: 6,776.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.25 : 11,988.75 = 4,909.47 : x
  2. Step 2: Convert to fraction form
    8,686.25/11,988.75 = 4,909.47/x
  3. Step 3: Cross multiply
    8,686.25x = 11,988.75 × 4,909.47
  4. Step 4: Simplify right side
    8,686.25x = 58,858,408.46
  5. Step 5: Solve for x
    x = 58,858,408.46/8,686.25
  6. Step 6: Final answer
    x = 6,776.04

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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.