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Finding the Fourth Proportional to 15,157.60, 20,918.13 and 8,443.23

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Solution

The fourth proportional to 15,157.60, 20,918.13 and 8,443.23 is: 11,652.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.60 : 20,918.13 = 8,443.23 : x
  2. Step 2: Convert to fraction form
    15,157.60/20,918.13 = 8,443.23/x
  3. Step 3: Cross multiply
    15,157.60x = 20,918.13 × 8,443.23
  4. Step 4: Simplify right side
    15,157.60x = 176,616,582.76
  5. Step 5: Solve for x
    x = 176,616,582.76/15,157.60
  6. Step 6: Final answer
    x = 11,652.02

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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.