Home / 20,077.40-30,134.60-10,223.75

Finding the Fourth Proportional to 20,077.40, 30,134.60 and 10,223.75

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Solution

The fourth proportional to 20,077.40, 30,134.60 and 10,223.75 is: 15,345.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,077.40 : 30,134.60 = 10,223.75 : x
  2. Step 2: Convert to fraction form
    20,077.40/30,134.60 = 10,223.75/x
  3. Step 3: Cross multiply
    20,077.40x = 30,134.60 × 10,223.75
  4. Step 4: Simplify right side
    20,077.40x = 308,088,616.75
  5. Step 5: Solve for x
    x = 308,088,616.75/20,077.40
  6. Step 6: Final answer
    x = 15,345.05

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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.