Home / 20,878.90-31,316.66-10,201.95

Finding the Fourth Proportional to 20,878.90, 31,316.66 and 10,201.95

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Solution

The fourth proportional to 20,878.90, 31,316.66 and 10,201.95 is: 15,302.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.90 : 31,316.66 = 10,201.95 : x
  2. Step 2: Convert to fraction form
    20,878.90/31,316.66 = 10,201.95/x
  3. Step 3: Cross multiply
    20,878.90x = 31,316.66 × 10,201.95
  4. Step 4: Simplify right side
    20,878.90x = 319,490,986.73
  5. Step 5: Solve for x
    x = 319,490,986.73/20,878.90
  6. Step 6: Final answer
    x = 15,302.10

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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.