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Finding the Fourth Proportional to 7,189.32, 9,921.15 and 4,045.52

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Solution

The fourth proportional to 7,189.32, 9,921.15 and 4,045.52 is: 5,582.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,189.32 : 9,921.15 = 4,045.52 : x
  2. Step 2: Convert to fraction form
    7,189.32/9,921.15 = 4,045.52/x
  3. Step 3: Cross multiply
    7,189.32x = 9,921.15 × 4,045.52
  4. Step 4: Simplify right side
    7,189.32x = 40,136,161.14
  5. Step 5: Solve for x
    x = 40,136,161.14/7,189.32
  6. Step 6: Final answer
    x = 5,582.75

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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.