Home / 12,728.84-17,574.90-8,489.92

Finding the Fourth Proportional to 12,728.84, 17,574.90 and 8,489.92

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Solution

The fourth proportional to 12,728.84, 17,574.90 and 8,489.92 is: 11,722.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.84 : 17,574.90 = 8,489.92 : x
  2. Step 2: Convert to fraction form
    12,728.84/17,574.90 = 8,489.92/x
  3. Step 3: Cross multiply
    12,728.84x = 17,574.90 × 8,489.92
  4. Step 4: Simplify right side
    12,728.84x = 149,209,495.01
  5. Step 5: Solve for x
    x = 149,209,495.01/12,728.84
  6. Step 6: Final answer
    x = 11,722.16

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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.