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Finding the Fourth Proportional to 15,443.46, 21,312 and 8,369.88

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Solution

The fourth proportional to 15,443.46, 21,312 and 8,369.88 is: 11,550.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,443.46 : 21,312 = 8,369.88 : x
  2. Step 2: Convert to fraction form
    15,443.46/21,312 = 8,369.88/x
  3. Step 3: Cross multiply
    15,443.46x = 21,312 × 8,369.88
  4. Step 4: Simplify right side
    15,443.46x = 178,378,882.56
  5. Step 5: Solve for x
    x = 178,378,882.56/15,443.46
  6. Step 6: Final answer
    x = 11,550.45

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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.