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Finding the Fourth Proportional to 27,992.88, 38,630.16 and 15,417.54

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Solution

The fourth proportional to 27,992.88, 38,630.16 and 15,417.54 is: 21,276.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,992.88 : 38,630.16 = 15,417.54 : x
  2. Step 2: Convert to fraction form
    27,992.88/38,630.16 = 15,417.54/x
  3. Step 3: Cross multiply
    27,992.88x = 38,630.16 × 15,417.54
  4. Step 4: Simplify right side
    27,992.88x = 595,582,037.01
  5. Step 5: Solve for x
    x = 595,582,037.01/27,992.88
  6. Step 6: Final answer
    x = 21,276.20

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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.