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Finding the Fourth Proportional to 7,191.88, 10,788.78 and 3,031.24

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Solution

The fourth proportional to 7,191.88, 10,788.78 and 3,031.24 is: 4,547.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.88 : 10,788.78 = 3,031.24 : x
  2. Step 2: Convert to fraction form
    7,191.88/10,788.78 = 3,031.24/x
  3. Step 3: Cross multiply
    7,191.88x = 10,788.78 × 3,031.24
  4. Step 4: Simplify right side
    7,191.88x = 32,703,381.49
  5. Step 5: Solve for x
    x = 32,703,381.49/7,191.88
  6. Step 6: Final answer
    x = 4,547.26

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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.