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Finding the Fourth Proportional to 19,375.79, 26,740.13 and 10,878.47

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Solution

The fourth proportional to 19,375.79, 26,740.13 and 10,878.47 is: 15,013.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,375.79 : 26,740.13 = 10,878.47 : x
  2. Step 2: Convert to fraction form
    19,375.79/26,740.13 = 10,878.47/x
  3. Step 3: Cross multiply
    19,375.79x = 26,740.13 × 10,878.47
  4. Step 4: Simplify right side
    19,375.79x = 290,891,513.91
  5. Step 5: Solve for x
    x = 290,891,513.91/19,375.79
  6. Step 6: Final answer
    x = 15,013.15

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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.