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Finding the Fourth Proportional to 28,995,764.40, 43,507,643.40 and 20,457,716.40

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Solution

The fourth proportional to 28,995,764.40, 43,507,643.40 and 20,457,716.40 is: 30,696,449.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,995,764.40 : 43,507,643.40 = 20,457,716.40 : x
  2. Step 2: Convert to fraction form
    28,995,764.40/43,507,643.40 = 20,457,716.40/x
  3. Step 3: Cross multiply
    28,995,764.40x = 43,507,643.40 × 20,457,716.40
  4. Step 4: Simplify right side
    28,995,764.40x = 890,067,029,909,531.62
  5. Step 5: Solve for x
    x = 890,067,029,909,531.62/28,995,764.40
  6. Step 6: Final answer
    x = 30,696,449.92

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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.