Home / 20,118.78-30,042.66-16,428.22

Finding the Fourth Proportional to 20,118.78, 30,042.66 and 16,428.22

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Solution

The fourth proportional to 20,118.78, 30,042.66 and 16,428.22 is: 24,531.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.78 : 30,042.66 = 16,428.22 : x
  2. Step 2: Convert to fraction form
    20,118.78/30,042.66 = 16,428.22/x
  3. Step 3: Cross multiply
    20,118.78x = 30,042.66 × 16,428.22
  4. Step 4: Simplify right side
    20,118.78x = 493,547,427.87
  5. Step 5: Solve for x
    x = 493,547,427.87/20,118.78
  6. Step 6: Final answer
    x = 24,531.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.