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Finding the Fourth Proportional to 15,993.86, 22,071.29 and 8,920.13

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Solution

The fourth proportional to 15,993.86, 22,071.29 and 8,920.13 is: 12,309.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,993.86 : 22,071.29 = 8,920.13 : x
  2. Step 2: Convert to fraction form
    15,993.86/22,071.29 = 8,920.13/x
  3. Step 3: Cross multiply
    15,993.86x = 22,071.29 × 8,920.13
  4. Step 4: Simplify right side
    15,993.86x = 196,878,621.11
  5. Step 5: Solve for x
    x = 196,878,621.11/15,993.86
  6. Step 6: Final answer
    x = 12,309.64

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.