Home / 9,115.16-12,575.70-6,991.34

Finding the Fourth Proportional to 9,115.16, 12,575.70 and 6,991.34

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Solution

The fourth proportional to 9,115.16, 12,575.70 and 6,991.34 is: 9,645.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.16 : 12,575.70 = 6,991.34 : x
  2. Step 2: Convert to fraction form
    9,115.16/12,575.70 = 6,991.34/x
  3. Step 3: Cross multiply
    9,115.16x = 12,575.70 × 6,991.34
  4. Step 4: Simplify right side
    9,115.16x = 87,920,931.56
  5. Step 5: Solve for x
    x = 87,920,931.56/9,115.16
  6. Step 6: Final answer
    x = 9,645.58

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Double scale
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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.