Home / 21,168,902.40-31,713,287.68-12,507,099.52

Finding the Fourth Proportional to 21,168,902.40, 31,713,287.68 and 12,507,099.52

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Solution

The fourth proportional to 21,168,902.40, 31,713,287.68 and 12,507,099.52 is: 18,736,977.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168,902.40 : 31,713,287.68 = 12,507,099.52 : x
  2. Step 2: Convert to fraction form
    21,168,902.40/31,713,287.68 = 12,507,099.52/x
  3. Step 3: Cross multiply
    21,168,902.40x = 31,713,287.68 × 12,507,099.52
  4. Step 4: Simplify right side
    21,168,902.40x = 396,641,245,120,149.88
  5. Step 5: Solve for x
    x = 396,641,245,120,149.88/21,168,902.40
  6. Step 6: Final answer
    x = 18,736,977.37

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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.