Home / 11,712.60-16,158.48-7,680.40

Finding the Fourth Proportional to 11,712.60, 16,158.48 and 7,680.40

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Solution

The fourth proportional to 11,712.60, 16,158.48 and 7,680.40 is: 10,595.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,712.60 : 16,158.48 = 7,680.40 : x
  2. Step 2: Convert to fraction form
    11,712.60/16,158.48 = 7,680.40/x
  3. Step 3: Cross multiply
    11,712.60x = 16,158.48 × 7,680.40
  4. Step 4: Simplify right side
    11,712.60x = 124,103,589.79
  5. Step 5: Solve for x
    x = 124,103,589.79/11,712.60
  6. Step 6: Final answer
    x = 10,595.73

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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.