Home / 8,728.72-12,045.60-5,145.76

Finding the Fourth Proportional to 8,728.72, 12,045.60 and 5,145.76

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Solution

The fourth proportional to 8,728.72, 12,045.60 and 5,145.76 is: 7,101.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.72 : 12,045.60 = 5,145.76 : x
  2. Step 2: Convert to fraction form
    8,728.72/12,045.60 = 5,145.76/x
  3. Step 3: Cross multiply
    8,728.72x = 12,045.60 × 5,145.76
  4. Step 4: Simplify right side
    8,728.72x = 61,983,766.66
  5. Step 5: Solve for x
    x = 61,983,766.66/8,728.72
  6. Step 6: Final answer
    x = 7,101.13

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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.