Home / 10,247.21-15,378.11-7,909.55

Finding the Fourth Proportional to 10,247.21, 15,378.11 and 7,909.55

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Solution

The fourth proportional to 10,247.21, 15,378.11 and 7,909.55 is: 11,869.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,247.21 : 15,378.11 = 7,909.55 : x
  2. Step 2: Convert to fraction form
    10,247.21/15,378.11 = 7,909.55/x
  3. Step 3: Cross multiply
    10,247.21x = 15,378.11 × 7,909.55
  4. Step 4: Simplify right side
    10,247.21x = 121,633,813.51
  5. Step 5: Solve for x
    x = 121,633,813.51/10,247.21
  6. Step 6: Final answer
    x = 11,869.95

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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.