Home / 15,378.46-21,222.68-8,663.66

Finding the Fourth Proportional to 15,378.46, 21,222.68 and 8,663.66

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Solution

The fourth proportional to 15,378.46, 21,222.68 and 8,663.66 is: 11,956.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.46 : 21,222.68 = 8,663.66 : x
  2. Step 2: Convert to fraction form
    15,378.46/21,222.68 = 8,663.66/x
  3. Step 3: Cross multiply
    15,378.46x = 21,222.68 × 8,663.66
  4. Step 4: Simplify right side
    15,378.46x = 183,866,013.96
  5. Step 5: Solve for x
    x = 183,866,013.96/15,378.46
  6. Step 6: Final answer
    x = 11,956.08

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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.