Home / 20,130.40-30,195.60-10,288.90

Finding the Fourth Proportional to 20,130.40, 30,195.60 and 10,288.90

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Solution

The fourth proportional to 20,130.40, 30,195.60 and 10,288.90 is: 15,433.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.40 : 30,195.60 = 10,288.90 : x
  2. Step 2: Convert to fraction form
    20,130.40/30,195.60 = 10,288.90/x
  3. Step 3: Cross multiply
    20,130.40x = 30,195.60 × 10,288.90
  4. Step 4: Simplify right side
    20,130.40x = 310,679,508.84
  5. Step 5: Solve for x
    x = 310,679,508.84/20,130.40
  6. Step 6: Final answer
    x = 15,433.35

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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.