Home / 20,154.40-30,207.30-10,288.60

Finding the Fourth Proportional to 20,154.40, 30,207.30 and 10,288.60

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Solution

The fourth proportional to 20,154.40, 30,207.30 and 10,288.60 is: 15,420.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,154.40 : 30,207.30 = 10,288.60 : x
  2. Step 2: Convert to fraction form
    20,154.40/30,207.30 = 10,288.60/x
  3. Step 3: Cross multiply
    20,154.40x = 30,207.30 × 10,288.60
  4. Step 4: Simplify right side
    20,154.40x = 310,790,826.78
  5. Step 5: Solve for x
    x = 310,790,826.78/20,154.40
  6. Step 6: Final answer
    x = 15,420.50

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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.