Home / 20,148.90-30,223.35-12,761.70

Finding the Fourth Proportional to 20,148.90, 30,223.35 and 12,761.70

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Solution

The fourth proportional to 20,148.90, 30,223.35 and 12,761.70 is: 19,142.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,148.90 : 30,223.35 = 12,761.70 : x
  2. Step 2: Convert to fraction form
    20,148.90/30,223.35 = 12,761.70/x
  3. Step 3: Cross multiply
    20,148.90x = 30,223.35 × 12,761.70
  4. Step 4: Simplify right side
    20,148.90x = 385,701,325.70
  5. Step 5: Solve for x
    x = 385,701,325.70/20,148.90
  6. Step 6: Final answer
    x = 19,142.55

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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.