Home / 28,254.90-38,993.51-18,678.17

Finding the Fourth Proportional to 28,254.90, 38,993.51 and 18,678.17

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Solution

The fourth proportional to 28,254.90, 38,993.51 and 18,678.17 is: 25,777.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.90 : 38,993.51 = 18,678.17 : x
  2. Step 2: Convert to fraction form
    28,254.90/38,993.51 = 18,678.17/x
  3. Step 3: Cross multiply
    28,254.90x = 38,993.51 × 18,678.17
  4. Step 4: Simplify right side
    28,254.90x = 728,327,120.32
  5. Step 5: Solve for x
    x = 728,327,120.32/28,254.90
  6. Step 6: Final answer
    x = 25,777.02

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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.