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Finding the Third Proportional to 18,090 and 25,920

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Solution

The third proportional to 18,090 and 25,920 is: 37,139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,090 : 25,920 = 25,920 : x
  2. Step 2: Convert to fraction form
    18,090/25,920 = 25,920/x
  3. Step 3: Cross multiply
    18,090x = 25,920 × 25,920
  4. Step 4: Simplify right side
    18,090x = 671,846,400
  5. Step 5: Solve for x
    x = 671,846,400/18,090
  6. Step 6: Final answer
    x = 37,139.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.