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Finding the Fourth Proportional to 7,189.59, 9,920.84 and 4,045.71

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Solution

The fourth proportional to 7,189.59, 9,920.84 and 4,045.71 is: 5,582.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,189.59 : 9,920.84 = 4,045.71 : x
  2. Step 2: Convert to fraction form
    7,189.59/9,920.84 = 4,045.71/x
  3. Step 3: Cross multiply
    7,189.59x = 9,920.84 × 4,045.71
  4. Step 4: Simplify right side
    7,189.59x = 40,136,821.37
  5. Step 5: Solve for x
    x = 40,136,821.37/7,189.59
  6. Step 6: Final answer
    x = 5,582.63

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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.