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Finding the Fourth Proportional to 18,348.31, 25,309.24 and 15,274.32

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Solution

The fourth proportional to 18,348.31, 25,309.24 and 15,274.32 is: 21,069.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.31 : 25,309.24 = 15,274.32 : x
  2. Step 2: Convert to fraction form
    18,348.31/25,309.24 = 15,274.32/x
  3. Step 3: Cross multiply
    18,348.31x = 25,309.24 × 15,274.32
  4. Step 4: Simplify right side
    18,348.31x = 386,581,430.72
  5. Step 5: Solve for x
    x = 386,581,430.72/18,348.31
  6. Step 6: Final answer
    x = 21,069.05

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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.