Home / 21,168,143.70-31,752,215.55-12,546,114.90

Finding the Fourth Proportional to 21,168,143.70, 31,752,215.55 and 12,546,114.90

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Solution

The fourth proportional to 21,168,143.70, 31,752,215.55 and 12,546,114.90 is: 18,819,172.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168,143.70 : 31,752,215.55 = 12,546,114.90 : x
  2. Step 2: Convert to fraction form
    21,168,143.70/31,752,215.55 = 12,546,114.90/x
  3. Step 3: Cross multiply
    21,168,143.70x = 31,752,215.55 × 12,546,114.90
  4. Step 4: Simplify right side
    21,168,143.70x = 398,366,944,619,866.69
  5. Step 5: Solve for x
    x = 398,366,944,619,866.69/21,168,143.70
  6. Step 6: Final answer
    x = 18,819,172.35

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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.