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Finding the Fourth Proportional to 40,840.56, 61,260.72 and 13,138.56

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Solution

The fourth proportional to 40,840.56, 61,260.72 and 13,138.56 is: 19,707.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,840.56 : 61,260.72 = 13,138.56 : x
  2. Step 2: Convert to fraction form
    40,840.56/61,260.72 = 13,138.56/x
  3. Step 3: Cross multiply
    40,840.56x = 61,260.72 × 13,138.56
  4. Step 4: Simplify right side
    40,840.56x = 804,877,645.36
  5. Step 5: Solve for x
    x = 804,877,645.36/40,840.56
  6. Step 6: Final answer
    x = 19,707.80

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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.