Home / 28,489-39,315.06-15,916.36

Finding the Fourth Proportional to 28,489, 39,315.06 and 15,916.36

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Solution

The fourth proportional to 28,489, 39,315.06 and 15,916.36 is: 21,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489 : 39,315.06 = 15,916.36 : x
  2. Step 2: Convert to fraction form
    28,489/39,315.06 = 15,916.36/x
  3. Step 3: Cross multiply
    28,489x = 39,315.06 × 15,916.36
  4. Step 4: Simplify right side
    28,489x = 625,752,648.38
  5. Step 5: Solve for x
    x = 625,752,648.38/28,489
  6. Step 6: Final answer
    x = 21,964.71

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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.