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Finding the Fourth Proportional to 15,158.80, 20,918.72 and 8,444.44

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Solution

The fourth proportional to 15,158.80, 20,918.72 and 8,444.44 is: 11,653.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.80 : 20,918.72 = 8,444.44 : x
  2. Step 2: Convert to fraction form
    15,158.80/20,918.72 = 8,444.44/x
  3. Step 3: Cross multiply
    15,158.80x = 20,918.72 × 8,444.44
  4. Step 4: Simplify right side
    15,158.80x = 176,646,875.92
  5. Step 5: Solve for x
    x = 176,646,875.92/15,158.80
  6. Step 6: Final answer
    x = 11,653.09

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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.