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Finding the Fourth Proportional to 43,336.80, 65,005.20 and 20,008.80

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Solution

The fourth proportional to 43,336.80, 65,005.20 and 20,008.80 is: 30,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,336.80 : 65,005.20 = 20,008.80 : x
  2. Step 2: Convert to fraction form
    43,336.80/65,005.20 = 20,008.80/x
  3. Step 3: Cross multiply
    43,336.80x = 65,005.20 × 20,008.80
  4. Step 4: Simplify right side
    43,336.80x = 1,300,676,045.76
  5. Step 5: Solve for x
    x = 1,300,676,045.76/43,336.80
  6. Step 6: Final answer
    x = 30,013.20

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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.