Home / 20,139.90-30,177.45-16,835.10

Finding the Fourth Proportional to 20,139.90, 30,177.45 and 16,835.10

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Solution

The fourth proportional to 20,139.90, 30,177.45 and 16,835.10 is: 25,225.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.90 : 30,177.45 = 16,835.10 : x
  2. Step 2: Convert to fraction form
    20,139.90/30,177.45 = 16,835.10/x
  3. Step 3: Cross multiply
    20,139.90x = 30,177.45 × 16,835.10
  4. Step 4: Simplify right side
    20,139.90x = 508,040,388.50
  5. Step 5: Solve for x
    x = 508,040,388.50/20,139.90
  6. Step 6: Final answer
    x = 25,225.57

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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.