Home / 21,084,429.20-31,626,643.80-12,462,400.40

Finding the Fourth Proportional to 21,084,429.20, 31,626,643.80 and 12,462,400.40

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Solution

The fourth proportional to 21,084,429.20, 31,626,643.80 and 12,462,400.40 is: 18,693,600.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084,429.20 : 31,626,643.80 = 12,462,400.40 : x
  2. Step 2: Convert to fraction form
    21,084,429.20/31,626,643.80 = 12,462,400.40/x
  3. Step 3: Cross multiply
    21,084,429.20x = 31,626,643.80 × 12,462,400.40
  4. Step 4: Simplify right side
    21,084,429.20x = 394,143,898,343,777.56
  5. Step 5: Solve for x
    x = 394,143,898,343,777.56/21,084,429.20
  6. Step 6: Final answer
    x = 18,693,600.60

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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.