Home / 5,139.20-7,708.80-4,774.70

Finding the Fourth Proportional to 5,139.20, 7,708.80 and 4,774.70

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Solution

The fourth proportional to 5,139.20, 7,708.80 and 4,774.70 is: 7,162.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.20 : 7,708.80 = 4,774.70 : x
  2. Step 2: Convert to fraction form
    5,139.20/7,708.80 = 4,774.70/x
  3. Step 3: Cross multiply
    5,139.20x = 7,708.80 × 4,774.70
  4. Step 4: Simplify right side
    5,139.20x = 36,807,207.36
  5. Step 5: Solve for x
    x = 36,807,207.36/5,139.20
  6. Step 6: Final answer
    x = 7,162.05

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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.