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Finding the Fourth Proportional to 15,158.54, 20,918.61 and 8,444.16

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Solution

The fourth proportional to 15,158.54, 20,918.61 and 8,444.16 is: 11,652.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.54 : 20,918.61 = 8,444.16 : x
  2. Step 2: Convert to fraction form
    15,158.54/20,918.61 = 8,444.16/x
  3. Step 3: Cross multiply
    15,158.54x = 20,918.61 × 8,444.16
  4. Step 4: Simplify right side
    15,158.54x = 176,640,089.82
  5. Step 5: Solve for x
    x = 176,640,089.82/15,158.54
  6. Step 6: Final answer
    x = 11,652.84

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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.