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Finding the Fourth Proportional to 18,878.35, 26,051.89 and 10,920.41

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Solution

The fourth proportional to 18,878.35, 26,051.89 and 10,920.41 is: 15,070.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.35 : 26,051.89 = 10,920.41 : x
  2. Step 2: Convert to fraction form
    18,878.35/26,051.89 = 10,920.41/x
  3. Step 3: Cross multiply
    18,878.35x = 26,051.89 × 10,920.41
  4. Step 4: Simplify right side
    18,878.35x = 284,497,320.07
  5. Step 5: Solve for x
    x = 284,497,320.07/18,878.35
  6. Step 6: Final answer
    x = 15,070.03

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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.