Home / 5,139.10-7,700.55-4,312.90

Finding the Fourth Proportional to 5,139.10, 7,700.55 and 4,312.90

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Solution

The fourth proportional to 5,139.10, 7,700.55 and 4,312.90 is: 6,462.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.10 : 7,700.55 = 4,312.90 : x
  2. Step 2: Convert to fraction form
    5,139.10/7,700.55 = 4,312.90/x
  3. Step 3: Cross multiply
    5,139.10x = 7,700.55 × 4,312.90
  4. Step 4: Simplify right side
    5,139.10x = 33,211,702.10
  5. Step 5: Solve for x
    x = 33,211,702.10/5,139.10
  6. Step 6: Final answer
    x = 6,462.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.