Home / 20,123.90-30,185.85-16,843.40

Finding the Fourth Proportional to 20,123.90, 30,185.85 and 16,843.40

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Solution

The fourth proportional to 20,123.90, 30,185.85 and 16,843.40 is: 25,265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.90 : 30,185.85 = 16,843.40 : x
  2. Step 2: Convert to fraction form
    20,123.90/30,185.85 = 16,843.40/x
  3. Step 3: Cross multiply
    20,123.90x = 30,185.85 × 16,843.40
  4. Step 4: Simplify right side
    20,123.90x = 508,432,345.89
  5. Step 5: Solve for x
    x = 508,432,345.89/20,123.90
  6. Step 6: Final answer
    x = 25,265.10

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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.