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Finding the Fourth Proportional to 7,148.52, 10,721.48 and 2,987.42

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Solution

The fourth proportional to 7,148.52, 10,721.48 and 2,987.42 is: 4,480.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,148.52 : 10,721.48 = 2,987.42 : x
  2. Step 2: Convert to fraction form
    7,148.52/10,721.48 = 2,987.42/x
  3. Step 3: Cross multiply
    7,148.52x = 10,721.48 × 2,987.42
  4. Step 4: Simplify right side
    7,148.52x = 32,029,495.24
  5. Step 5: Solve for x
    x = 32,029,495.24/7,148.52
  6. Step 6: Final answer
    x = 4,480.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.