Home / 28,178.88-38,876.11-18,623.31

Finding the Fourth Proportional to 28,178.88, 38,876.11 and 18,623.31

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Solution

The fourth proportional to 28,178.88, 38,876.11 and 18,623.31 is: 25,693.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.88 : 38,876.11 = 18,623.31 : x
  2. Step 2: Convert to fraction form
    28,178.88/38,876.11 = 18,623.31/x
  3. Step 3: Cross multiply
    28,178.88x = 38,876.11 × 18,623.31
  4. Step 4: Simplify right side
    28,178.88x = 724,001,848.12
  5. Step 5: Solve for x
    x = 724,001,848.12/28,178.88
  6. Step 6: Final answer
    x = 25,693.07

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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.