Home / 7,115.30-9,818.81-3,971.46

Finding the Fourth Proportional to 7,115.30, 9,818.81 and 3,971.46

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Solution

The fourth proportional to 7,115.30, 9,818.81 and 3,971.46 is: 5,480.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.30 : 9,818.81 = 3,971.46 : x
  2. Step 2: Convert to fraction form
    7,115.30/9,818.81 = 3,971.46/x
  3. Step 3: Cross multiply
    7,115.30x = 9,818.81 × 3,971.46
  4. Step 4: Simplify right side
    7,115.30x = 38,995,011.16
  5. Step 5: Solve for x
    x = 38,995,011.16/7,115.30
  6. Step 6: Final answer
    x = 5,480.45

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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.