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Finding the Fourth Proportional to 15,158.34, 20,919.60 and 8,443.98

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Solution

The fourth proportional to 15,158.34, 20,919.60 and 8,443.98 is: 11,653.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.34 : 20,919.60 = 8,443.98 : x
  2. Step 2: Convert to fraction form
    15,158.34/20,919.60 = 8,443.98/x
  3. Step 3: Cross multiply
    15,158.34x = 20,919.60 × 8,443.98
  4. Step 4: Simplify right side
    15,158.34x = 176,644,684.01
  5. Step 5: Solve for x
    x = 176,644,684.01/15,158.34
  6. Step 6: Final answer
    x = 11,653.30

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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.