Home / 11,031.73-15,215.68-6,999.78

Finding the Fourth Proportional to 11,031.73, 15,215.68 and 6,999.78

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Solution

The fourth proportional to 11,031.73, 15,215.68 and 6,999.78 is: 9,654.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,031.73 : 15,215.68 = 6,999.78 : x
  2. Step 2: Convert to fraction form
    11,031.73/15,215.68 = 6,999.78/x
  3. Step 3: Cross multiply
    11,031.73x = 15,215.68 × 6,999.78
  4. Step 4: Simplify right side
    11,031.73x = 106,506,478.36
  5. Step 5: Solve for x
    x = 106,506,478.36/11,031.73
  6. Step 6: Final answer
    x = 9,654.56

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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.