Home / 18,787.95-28,034.91-18,678.60

Finding the Fourth Proportional to 18,787.95, 28,034.91 and 18,678.60

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Solution

The fourth proportional to 18,787.95, 28,034.91 and 18,678.60 is: 27,871.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.95 : 28,034.91 = 18,678.60 : x
  2. Step 2: Convert to fraction form
    18,787.95/28,034.91 = 18,678.60/x
  3. Step 3: Cross multiply
    18,787.95x = 28,034.91 × 18,678.60
  4. Step 4: Simplify right side
    18,787.95x = 523,652,869.93
  5. Step 5: Solve for x
    x = 523,652,869.93/18,787.95
  6. Step 6: Final answer
    x = 27,871.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.