Home / 27,979-38,611.14-15,403.48

Finding the Fourth Proportional to 27,979, 38,611.14 and 15,403.48

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Solution

The fourth proportional to 27,979, 38,611.14 and 15,403.48 is: 21,256.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979 : 38,611.14 = 15,403.48 : x
  2. Step 2: Convert to fraction form
    27,979/38,611.14 = 15,403.48/x
  3. Step 3: Cross multiply
    27,979x = 38,611.14 × 15,403.48
  4. Step 4: Simplify right side
    27,979x = 594,745,922.77
  5. Step 5: Solve for x
    x = 594,745,922.77/27,979
  6. Step 6: Final answer
    x = 21,256.87

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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.