Home / 20,159.10-30,235.05-12,750.30

Finding the Fourth Proportional to 20,159.10, 30,235.05 and 12,750.30

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Solution

The fourth proportional to 20,159.10, 30,235.05 and 12,750.30 is: 19,123.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.10 : 30,235.05 = 12,750.30 : x
  2. Step 2: Convert to fraction form
    20,159.10/30,235.05 = 12,750.30/x
  3. Step 3: Cross multiply
    20,159.10x = 30,235.05 × 12,750.30
  4. Step 4: Simplify right side
    20,159.10x = 385,505,958.02
  5. Step 5: Solve for x
    x = 385,505,958.02/20,159.10
  6. Step 6: Final answer
    x = 19,123.17

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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.