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Finding the Fourth Proportional to 18,290.96, 25,243.08 and 15,301.52

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Solution

The fourth proportional to 18,290.96, 25,243.08 and 15,301.52 is: 21,117.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,290.96 : 25,243.08 = 15,301.52 : x
  2. Step 2: Convert to fraction form
    18,290.96/25,243.08 = 15,301.52/x
  3. Step 3: Cross multiply
    18,290.96x = 25,243.08 × 15,301.52
  4. Step 4: Simplify right side
    18,290.96x = 386,257,493.48
  5. Step 5: Solve for x
    x = 386,257,493.48/18,290.96
  6. Step 6: Final answer
    x = 21,117.40

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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.