Home / 12,389.73-18,588.24-4,990.38

Finding the Fourth Proportional to 12,389.73, 18,588.24 and 4,990.38

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Solution

The fourth proportional to 12,389.73, 18,588.24 and 4,990.38 is: 7,487.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.73 : 18,588.24 = 4,990.38 : x
  2. Step 2: Convert to fraction form
    12,389.73/18,588.24 = 4,990.38/x
  3. Step 3: Cross multiply
    12,389.73x = 18,588.24 × 4,990.38
  4. Step 4: Simplify right side
    12,389.73x = 92,762,381.13
  5. Step 5: Solve for x
    x = 92,762,381.13/12,389.73
  6. Step 6: Final answer
    x = 7,487.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.