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Finding the Fourth Proportional to 43,681.68, 65,415.60 and 20,314.80

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Solution

The fourth proportional to 43,681.68, 65,415.60 and 20,314.80 is: 30,422.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,681.68 : 65,415.60 = 20,314.80 : x
  2. Step 2: Convert to fraction form
    43,681.68/65,415.60 = 20,314.80/x
  3. Step 3: Cross multiply
    43,681.68x = 65,415.60 × 20,314.80
  4. Step 4: Simplify right side
    43,681.68x = 1,328,904,830.88
  5. Step 5: Solve for x
    x = 1,328,904,830.88/43,681.68
  6. Step 6: Final answer
    x = 30,422.48

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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.