Home / 20,104.40-30,158.40-8,415.20

Finding the Fourth Proportional to 20,104.40, 30,158.40 and 8,415.20

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Solution

The fourth proportional to 20,104.40, 30,158.40 and 8,415.20 is: 12,623.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,104.40 : 30,158.40 = 8,415.20 : x
  2. Step 2: Convert to fraction form
    20,104.40/30,158.40 = 8,415.20/x
  3. Step 3: Cross multiply
    20,104.40x = 30,158.40 × 8,415.20
  4. Step 4: Simplify right side
    20,104.40x = 253,788,967.68
  5. Step 5: Solve for x
    x = 253,788,967.68/20,104.40
  6. Step 6: Final answer
    x = 12,623.55

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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.