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Finding the Fourth Proportional to 40,720.68, 61,081.74 and 13,018.68

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Solution

The fourth proportional to 40,720.68, 61,081.74 and 13,018.68 is: 19,528.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,720.68 : 61,081.74 = 13,018.68 : x
  2. Step 2: Convert to fraction form
    40,720.68/61,081.74 = 13,018.68/x
  3. Step 3: Cross multiply
    40,720.68x = 61,081.74 × 13,018.68
  4. Step 4: Simplify right side
    40,720.68x = 795,203,626.90
  5. Step 5: Solve for x
    x = 795,203,626.90/40,720.68
  6. Step 6: Final answer
    x = 19,528.25

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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.