Home / 8,891.40-12,270.84-5,115.76

Finding the Fourth Proportional to 8,891.40, 12,270.84 and 5,115.76

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Solution

The fourth proportional to 8,891.40, 12,270.84 and 5,115.76 is: 7,060.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.40 : 12,270.84 = 5,115.76 : x
  2. Step 2: Convert to fraction form
    8,891.40/12,270.84 = 5,115.76/x
  3. Step 3: Cross multiply
    8,891.40x = 12,270.84 × 5,115.76
  4. Step 4: Simplify right side
    8,891.40x = 62,774,672.44
  5. Step 5: Solve for x
    x = 62,774,672.44/8,891.40
  6. Step 6: Final answer
    x = 7,060.16

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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.