Home / 5,378.79-7,421.92-3,020.47

Finding the Fourth Proportional to 5,378.79, 7,421.92 and 3,020.47

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Solution

The fourth proportional to 5,378.79, 7,421.92 and 3,020.47 is: 4,167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.79 : 7,421.92 = 3,020.47 : x
  2. Step 2: Convert to fraction form
    5,378.79/7,421.92 = 3,020.47/x
  3. Step 3: Cross multiply
    5,378.79x = 7,421.92 × 3,020.47
  4. Step 4: Simplify right side
    5,378.79x = 22,417,686.70
  5. Step 5: Solve for x
    x = 22,417,686.70/5,378.79
  6. Step 6: Final answer
    x = 4,167.79

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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.