Home / 28,270.89-42,323.79-21,186.54

Finding the Fourth Proportional to 28,270.89, 42,323.79 and 21,186.54

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Solution

The fourth proportional to 28,270.89, 42,323.79 and 21,186.54 is: 31,717.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,270.89 : 42,323.79 = 21,186.54 : x
  2. Step 2: Convert to fraction form
    28,270.89/42,323.79 = 21,186.54/x
  3. Step 3: Cross multiply
    28,270.89x = 42,323.79 × 21,186.54
  4. Step 4: Simplify right side
    28,270.89x = 896,694,669.79
  5. Step 5: Solve for x
    x = 896,694,669.79/28,270.89
  6. Step 6: Final answer
    x = 31,717.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.