Home / 7,045.20-9,721.72-4,212.02

Finding the Fourth Proportional to 7,045.20, 9,721.72 and 4,212.02

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Solution

The fourth proportional to 7,045.20, 9,721.72 and 4,212.02 is: 5,812.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,045.20 : 9,721.72 = 4,212.02 : x
  2. Step 2: Convert to fraction form
    7,045.20/9,721.72 = 4,212.02/x
  3. Step 3: Cross multiply
    7,045.20x = 9,721.72 × 4,212.02
  4. Step 4: Simplify right side
    7,045.20x = 40,948,108.64
  5. Step 5: Solve for x
    x = 40,948,108.64/7,045.20
  6. Step 6: Final answer
    x = 5,812.20

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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.