Home / 28,254.78-38,993.13-15,679.80

Finding the Fourth Proportional to 28,254.78, 38,993.13 and 15,679.80

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Solution

The fourth proportional to 28,254.78, 38,993.13 and 15,679.80 is: 21,638.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.78 : 38,993.13 = 15,679.80 : x
  2. Step 2: Convert to fraction form
    28,254.78/38,993.13 = 15,679.80/x
  3. Step 3: Cross multiply
    28,254.78x = 38,993.13 × 15,679.80
  4. Step 4: Simplify right side
    28,254.78x = 611,404,479.77
  5. Step 5: Solve for x
    x = 611,404,479.77/28,254.78
  6. Step 6: Final answer
    x = 21,638.98

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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.