Home / 9,151.38-12,580.41-7,870.58

Finding the Fourth Proportional to 9,151.38, 12,580.41 and 7,870.58

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Solution

The fourth proportional to 9,151.38, 12,580.41 and 7,870.58 is: 10,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,151.38 : 12,580.41 = 7,870.58 : x
  2. Step 2: Convert to fraction form
    9,151.38/12,580.41 = 7,870.58/x
  3. Step 3: Cross multiply
    9,151.38x = 12,580.41 × 7,870.58
  4. Step 4: Simplify right side
    9,151.38x = 99,015,060.44
  5. Step 5: Solve for x
    x = 99,015,060.44/9,151.38
  6. Step 6: Final answer
    x = 10,819.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.