Home / 9,219.42-12,721.15-5,239.76

Finding the Fourth Proportional to 9,219.42, 12,721.15 and 5,239.76

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Solution

The fourth proportional to 9,219.42, 12,721.15 and 5,239.76 is: 7,229.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,219.42 : 12,721.15 = 5,239.76 : x
  2. Step 2: Convert to fraction form
    9,219.42/12,721.15 = 5,239.76/x
  3. Step 3: Cross multiply
    9,219.42x = 12,721.15 × 5,239.76
  4. Step 4: Simplify right side
    9,219.42x = 66,655,823.20
  5. Step 5: Solve for x
    x = 66,655,823.20/9,219.42
  6. Step 6: Final answer
    x = 7,229.94

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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.