Home / 15,195.25-20,970.27-8,909.65

Finding the Fourth Proportional to 15,195.25, 20,970.27 and 8,909.65

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Solution

The fourth proportional to 15,195.25, 20,970.27 and 8,909.65 is: 12,295.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,195.25 : 20,970.27 = 8,909.65 : x
  2. Step 2: Convert to fraction form
    15,195.25/20,970.27 = 8,909.65/x
  3. Step 3: Cross multiply
    15,195.25x = 20,970.27 × 8,909.65
  4. Step 4: Simplify right side
    15,195.25x = 186,837,721.56
  5. Step 5: Solve for x
    x = 186,837,721.56/15,195.25
  6. Step 6: Final answer
    x = 12,295.80

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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.