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Finding the Fourth Proportional to 15,158.72, 20,918.70 and 8,444.31

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Solution

The fourth proportional to 15,158.72, 20,918.70 and 8,444.31 is: 11,652.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.72 : 20,918.70 = 8,444.31 : x
  2. Step 2: Convert to fraction form
    15,158.72/20,918.70 = 8,444.31/x
  3. Step 3: Cross multiply
    15,158.72x = 20,918.70 × 8,444.31
  4. Step 4: Simplify right side
    15,158.72x = 176,643,987.60
  5. Step 5: Solve for x
    x = 176,643,987.60/15,158.72
  6. Step 6: Final answer
    x = 11,652.97

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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.