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Finding the Fourth Proportional to 18,703.67, 25,799.59 and 12,738.02

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Solution

The fourth proportional to 18,703.67, 25,799.59 and 12,738.02 is: 17,570.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.67 : 25,799.59 = 12,738.02 : x
  2. Step 2: Convert to fraction form
    18,703.67/25,799.59 = 12,738.02/x
  3. Step 3: Cross multiply
    18,703.67x = 25,799.59 × 12,738.02
  4. Step 4: Simplify right side
    18,703.67x = 328,635,693.41
  5. Step 5: Solve for x
    x = 328,635,693.41/18,703.67
  6. Step 6: Final answer
    x = 17,570.65

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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.