Home / 15,134.80-20,885.60-8,420.08

Finding the Fourth Proportional to 15,134.80, 20,885.60 and 8,420.08

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Solution

The fourth proportional to 15,134.80, 20,885.60 and 8,420.08 is: 11,619.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,134.80 : 20,885.60 = 8,420.08 : x
  2. Step 2: Convert to fraction form
    15,134.80/20,885.60 = 8,420.08/x
  3. Step 3: Cross multiply
    15,134.80x = 20,885.60 × 8,420.08
  4. Step 4: Simplify right side
    15,134.80x = 175,858,422.85
  5. Step 5: Solve for x
    x = 175,858,422.85/15,134.80
  6. Step 6: Final answer
    x = 11,619.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.