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Finding the Fourth Proportional to 15,820.31, 21,832.13 and 8,746.99

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Solution

The fourth proportional to 15,820.31, 21,832.13 and 8,746.99 is: 12,070.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.31 : 21,832.13 = 8,746.99 : x
  2. Step 2: Convert to fraction form
    15,820.31/21,832.13 = 8,746.99/x
  3. Step 3: Cross multiply
    15,820.31x = 21,832.13 × 8,746.99
  4. Step 4: Simplify right side
    15,820.31x = 190,965,390.08
  5. Step 5: Solve for x
    x = 190,965,390.08/15,820.31
  6. Step 6: Final answer
    x = 12,070.90

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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.