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Finding the Fourth Proportional to 15,826.31, 21,840.45 and 8,753.21

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Solution

The fourth proportional to 15,826.31, 21,840.45 and 8,753.21 is: 12,079.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,826.31 : 21,840.45 = 8,753.21 : x
  2. Step 2: Convert to fraction form
    15,826.31/21,840.45 = 8,753.21/x
  3. Step 3: Cross multiply
    15,826.31x = 21,840.45 × 8,753.21
  4. Step 4: Simplify right side
    15,826.31x = 191,174,045.34
  5. Step 5: Solve for x
    x = 191,174,045.34/15,826.31
  6. Step 6: Final answer
    x = 12,079.51

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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.