Home / 7,751.72-10,679.28-5,389.76

Finding the Fourth Proportional to 7,751.72, 10,679.28 and 5,389.76

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Solution

The fourth proportional to 7,751.72, 10,679.28 and 5,389.76 is: 7,425.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,751.72 : 10,679.28 = 5,389.76 : x
  2. Step 2: Convert to fraction form
    7,751.72/10,679.28 = 5,389.76/x
  3. Step 3: Cross multiply
    7,751.72x = 10,679.28 × 5,389.76
  4. Step 4: Simplify right side
    7,751.72x = 57,558,702.78
  5. Step 5: Solve for x
    x = 57,558,702.78/7,751.72
  6. Step 6: Final answer
    x = 7,425.29

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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.