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Finding the Fourth Proportional to 17,978.32, 26,945.88 and 15,878.80

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Solution

The fourth proportional to 17,978.32, 26,945.88 and 15,878.80 is: 23,799.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978.32 : 26,945.88 = 15,878.80 : x
  2. Step 2: Convert to fraction form
    17,978.32/26,945.88 = 15,878.80/x
  3. Step 3: Cross multiply
    17,978.32x = 26,945.88 × 15,878.80
  4. Step 4: Simplify right side
    17,978.32x = 427,868,239.34
  5. Step 5: Solve for x
    x = 427,868,239.34/17,978.32
  6. Step 6: Final answer
    x = 23,799.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.