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Finding the Fourth Proportional to 7,151.90, 9,869.45 and 4,008.02

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Solution

The fourth proportional to 7,151.90, 9,869.45 and 4,008.02 is: 5,530.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,151.90 : 9,869.45 = 4,008.02 : x
  2. Step 2: Convert to fraction form
    7,151.90/9,869.45 = 4,008.02/x
  3. Step 3: Cross multiply
    7,151.90x = 9,869.45 × 4,008.02
  4. Step 4: Simplify right side
    7,151.90x = 39,556,883.60
  5. Step 5: Solve for x
    x = 39,556,883.60/7,151.90
  6. Step 6: Final answer
    x = 5,530.97

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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.