Home / 21,559.84-29,751.30-12,127.78

Finding the Fourth Proportional to 21,559.84, 29,751.30 and 12,127.78

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Solution

The fourth proportional to 21,559.84, 29,751.30 and 12,127.78 is: 16,735.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.84 : 29,751.30 = 12,127.78 : x
  2. Step 2: Convert to fraction form
    21,559.84/29,751.30 = 12,127.78/x
  3. Step 3: Cross multiply
    21,559.84x = 29,751.30 × 12,127.78
  4. Step 4: Simplify right side
    21,559.84x = 360,817,221.11
  5. Step 5: Solve for x
    x = 360,817,221.11/21,559.84
  6. Step 6: Final answer
    x = 16,735.62

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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.