Home / 5,572.80-7,690.40-3,215.68

Finding the Fourth Proportional to 5,572.80, 7,690.40 and 3,215.68

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Solution

The fourth proportional to 5,572.80, 7,690.40 and 3,215.68 is: 4,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,572.80 : 7,690.40 = 3,215.68 : x
  2. Step 2: Convert to fraction form
    5,572.80/7,690.40 = 3,215.68/x
  3. Step 3: Cross multiply
    5,572.80x = 7,690.40 × 3,215.68
  4. Step 4: Simplify right side
    5,572.80x = 24,729,865.47
  5. Step 5: Solve for x
    x = 24,729,865.47/5,572.80
  6. Step 6: Final answer
    x = 4,437.60

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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.