Home / 10,418.40-15,615.20-5,485.52

Finding the Fourth Proportional to 10,418.40, 15,615.20 and 5,485.52

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Solution

The fourth proportional to 10,418.40, 15,615.20 and 5,485.52 is: 8,221.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,418.40 : 15,615.20 = 5,485.52 : x
  2. Step 2: Convert to fraction form
    10,418.40/15,615.20 = 5,485.52/x
  3. Step 3: Cross multiply
    10,418.40x = 15,615.20 × 5,485.52
  4. Step 4: Simplify right side
    10,418.40x = 85,657,491.90
  5. Step 5: Solve for x
    x = 85,657,491.90/10,418.40
  6. Step 6: Final answer
    x = 8,221.75

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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.