Home / 8,316.78-11,475.18-5,171.28

Finding the Fourth Proportional to 8,316.78, 11,475.18 and 5,171.28

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Solution

The fourth proportional to 8,316.78, 11,475.18 and 5,171.28 is: 7,135.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,316.78 : 11,475.18 = 5,171.28 : x
  2. Step 2: Convert to fraction form
    8,316.78/11,475.18 = 5,171.28/x
  3. Step 3: Cross multiply
    8,316.78x = 11,475.18 × 5,171.28
  4. Step 4: Simplify right side
    8,316.78x = 59,341,368.83
  5. Step 5: Solve for x
    x = 59,341,368.83/8,316.78
  6. Step 6: Final answer
    x = 7,135.14

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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.