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Finding the Fourth Proportional to 15,089.23, 20,821.22 and 8,373.92

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Solution

The fourth proportional to 15,089.23, 20,821.22 and 8,373.92 is: 11,554.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,089.23 : 20,821.22 = 8,373.92 : x
  2. Step 2: Convert to fraction form
    15,089.23/20,821.22 = 8,373.92/x
  3. Step 3: Cross multiply
    15,089.23x = 20,821.22 × 8,373.92
  4. Step 4: Simplify right side
    15,089.23x = 174,355,303.57
  5. Step 5: Solve for x
    x = 174,355,303.57/15,089.23
  6. Step 6: Final answer
    x = 11,554.95

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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.