Home / 8,686.16-11,987.36-4,909.47

Finding the Fourth Proportional to 8,686.16, 11,987.36 and 4,909.47

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Solution

The fourth proportional to 8,686.16, 11,987.36 and 4,909.47 is: 6,775.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.16 : 11,987.36 = 4,909.47 : x
  2. Step 2: Convert to fraction form
    8,686.16/11,987.36 = 4,909.47/x
  3. Step 3: Cross multiply
    8,686.16x = 11,987.36 × 4,909.47
  4. Step 4: Simplify right side
    8,686.16x = 58,851,584.30
  5. Step 5: Solve for x
    x = 58,851,584.30/8,686.16
  6. Step 6: Final answer
    x = 6,775.33

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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.