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Finding the Fourth Proportional to 38,640.80, 58,090.80 and 32,938.40

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Solution

The fourth proportional to 38,640.80, 58,090.80 and 32,938.40 is: 49,518.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,640.80 : 58,090.80 = 32,938.40 : x
  2. Step 2: Convert to fraction form
    38,640.80/58,090.80 = 32,938.40/x
  3. Step 3: Cross multiply
    38,640.80x = 58,090.80 × 32,938.40
  4. Step 4: Simplify right side
    38,640.80x = 1,913,418,006.72
  5. Step 5: Solve for x
    x = 1,913,418,006.72/38,640.80
  6. Step 6: Final answer
    x = 49,518.07

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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.