Home / 38,640.16-57,963.60-10,938.40

Finding the Fourth Proportional to 38,640.16, 57,963.60 and 10,938.40

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Solution

The fourth proportional to 38,640.16, 57,963.60 and 10,938.40 is: 16,408.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,640.16 : 57,963.60 = 10,938.40 : x
  2. Step 2: Convert to fraction form
    38,640.16/57,963.60 = 10,938.40/x
  3. Step 3: Cross multiply
    38,640.16x = 57,963.60 × 10,938.40
  4. Step 4: Simplify right side
    38,640.16x = 634,029,042.24
  5. Step 5: Solve for x
    x = 634,029,042.24/38,640.16
  6. Step 6: Final answer
    x = 16,408.55

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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.