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Finding the Fourth Proportional to 39,640.40, 59,460.60 and 13,342.40

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Solution

The fourth proportional to 39,640.40, 59,460.60 and 13,342.40 is: 20,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,640.40 : 59,460.60 = 13,342.40 : x
  2. Step 2: Convert to fraction form
    39,640.40/59,460.60 = 13,342.40/x
  3. Step 3: Cross multiply
    39,640.40x = 59,460.60 × 13,342.40
  4. Step 4: Simplify right side
    39,640.40x = 793,347,109.44
  5. Step 5: Solve for x
    x = 793,347,109.44/39,640.40
  6. Step 6: Final answer
    x = 20,013.60

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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.