Home / 5,130-7,082.28-3,932.72

Finding the Fourth Proportional to 5,130, 7,082.28 and 3,932.72

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Solution

The fourth proportional to 5,130, 7,082.28 and 3,932.72 is: 5,429.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130 : 7,082.28 = 3,932.72 : x
  2. Step 2: Convert to fraction form
    5,130/7,082.28 = 3,932.72/x
  3. Step 3: Cross multiply
    5,130x = 7,082.28 × 3,932.72
  4. Step 4: Simplify right side
    5,130x = 27,852,624.20
  5. Step 5: Solve for x
    x = 27,852,624.20/5,130
  6. Step 6: Final answer
    x = 5,429.36

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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.