Home / 15,821.67-21,834.18-9,109.47

Finding the Fourth Proportional to 15,821.67, 21,834.18 and 9,109.47

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Solution

The fourth proportional to 15,821.67, 21,834.18 and 9,109.47 is: 12,571.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,821.67 : 21,834.18 = 9,109.47 : x
  2. Step 2: Convert to fraction form
    15,821.67/21,834.18 = 9,109.47/x
  3. Step 3: Cross multiply
    15,821.67x = 21,834.18 × 9,109.47
  4. Step 4: Simplify right side
    15,821.67x = 198,897,807.68
  5. Step 5: Solve for x
    x = 198,897,807.68/15,821.67
  6. Step 6: Final answer
    x = 12,571.23

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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.