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Finding the Fourth Proportional to 15,679.51, 21,638.18 and 8,873.01

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Solution

The fourth proportional to 15,679.51, 21,638.18 and 8,873.01 is: 12,245.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.51 : 21,638.18 = 8,873.01 : x
  2. Step 2: Convert to fraction form
    15,679.51/21,638.18 = 8,873.01/x
  3. Step 3: Cross multiply
    15,679.51x = 21,638.18 × 8,873.01
  4. Step 4: Simplify right side
    15,679.51x = 191,995,787.52
  5. Step 5: Solve for x
    x = 191,995,787.52/15,679.51
  6. Step 6: Final answer
    x = 12,245.01

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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.