Home / 5,378.80-7,423.12-2,989.06

Finding the Fourth Proportional to 5,378.80, 7,423.12 and 2,989.06

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Solution

The fourth proportional to 5,378.80, 7,423.12 and 2,989.06 is: 4,125.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.80 : 7,423.12 = 2,989.06 : x
  2. Step 2: Convert to fraction form
    5,378.80/7,423.12 = 2,989.06/x
  3. Step 3: Cross multiply
    5,378.80x = 7,423.12 × 2,989.06
  4. Step 4: Simplify right side
    5,378.80x = 22,188,151.07
  5. Step 5: Solve for x
    x = 22,188,151.07/5,378.80
  6. Step 6: Final answer
    x = 4,125.11

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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.