Home / 15,845.28-21,885-12,669.54

Finding the Fourth Proportional to 15,845.28, 21,885 and 12,669.54

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Solution

The fourth proportional to 15,845.28, 21,885 and 12,669.54 is: 17,498.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,845.28 : 21,885 = 12,669.54 : x
  2. Step 2: Convert to fraction form
    15,845.28/21,885 = 12,669.54/x
  3. Step 3: Cross multiply
    15,845.28x = 21,885 × 12,669.54
  4. Step 4: Simplify right side
    15,845.28x = 277,272,882.90
  5. Step 5: Solve for x
    x = 277,272,882.90/15,845.28
  6. Step 6: Final answer
    x = 17,498.77

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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.