Home / 20,153.60-30,230.40-19,959.20

Finding the Fourth Proportional to 20,153.60, 30,230.40 and 19,959.20

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Solution

The fourth proportional to 20,153.60, 30,230.40 and 19,959.20 is: 29,938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,153.60 : 30,230.40 = 19,959.20 : x
  2. Step 2: Convert to fraction form
    20,153.60/30,230.40 = 19,959.20/x
  3. Step 3: Cross multiply
    20,153.60x = 30,230.40 × 19,959.20
  4. Step 4: Simplify right side
    20,153.60x = 603,374,599.68
  5. Step 5: Solve for x
    x = 603,374,599.68/20,153.60
  6. Step 6: Final answer
    x = 29,938.80

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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.