Home / 9,131.28-12,579.30-8,686.58

Finding the Fourth Proportional to 9,131.28, 12,579.30 and 8,686.58

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Solution

The fourth proportional to 9,131.28, 12,579.30 and 8,686.58 is: 11,966.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,131.28 : 12,579.30 = 8,686.58 : x
  2. Step 2: Convert to fraction form
    9,131.28/12,579.30 = 8,686.58/x
  3. Step 3: Cross multiply
    9,131.28x = 12,579.30 × 8,686.58
  4. Step 4: Simplify right side
    9,131.28x = 109,271,095.79
  5. Step 5: Solve for x
    x = 109,271,095.79/9,131.28
  6. Step 6: Final answer
    x = 11,966.68

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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.