Home / 20,699.70-31,013.10-16,981.80

Finding the Fourth Proportional to 20,699.70, 31,013.10 and 16,981.80

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Solution

The fourth proportional to 20,699.70, 31,013.10 and 16,981.80 is: 25,442.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.70 : 31,013.10 = 16,981.80 : x
  2. Step 2: Convert to fraction form
    20,699.70/31,013.10 = 16,981.80/x
  3. Step 3: Cross multiply
    20,699.70x = 31,013.10 × 16,981.80
  4. Step 4: Simplify right side
    20,699.70x = 526,658,261.58
  5. Step 5: Solve for x
    x = 526,658,261.58/20,699.70
  6. Step 6: Final answer
    x = 25,442.80

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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.