Home / 15,679.14-21,638.75-8,965.76

Finding the Fourth Proportional to 15,679.14, 21,638.75 and 8,965.76

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Solution

The fourth proportional to 15,679.14, 21,638.75 and 8,965.76 is: 12,373.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.14 : 21,638.75 = 8,965.76 : x
  2. Step 2: Convert to fraction form
    15,679.14/21,638.75 = 8,965.76/x
  3. Step 3: Cross multiply
    15,679.14x = 21,638.75 × 8,965.76
  4. Step 4: Simplify right side
    15,679.14x = 194,007,686.18
  5. Step 5: Solve for x
    x = 194,007,686.18/15,679.14
  6. Step 6: Final answer
    x = 12,373.62

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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.