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Finding the Fourth Proportional to 43,897.20, 65,770.20 and 20,475.60

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Solution

The fourth proportional to 43,897.20, 65,770.20 and 20,475.60 is: 30,678.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,897.20 : 65,770.20 = 20,475.60 : x
  2. Step 2: Convert to fraction form
    43,897.20/65,770.20 = 20,475.60/x
  3. Step 3: Cross multiply
    43,897.20x = 65,770.20 × 20,475.60
  4. Step 4: Simplify right side
    43,897.20x = 1,346,684,307.12
  5. Step 5: Solve for x
    x = 1,346,684,307.12/43,897.20
  6. Step 6: Final answer
    x = 30,678.14

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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.