Home / 21,005,920.60-31,508,880.90-12,481,869.40

Finding the Fourth Proportional to 21,005,920.60, 31,508,880.90 and 12,481,869.40

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Solution

The fourth proportional to 21,005,920.60, 31,508,880.90 and 12,481,869.40 is: 18,722,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,920.60 : 31,508,880.90 = 12,481,869.40 : x
  2. Step 2: Convert to fraction form
    21,005,920.60/31,508,880.90 = 12,481,869.40/x
  3. Step 3: Cross multiply
    21,005,920.60x = 31,508,880.90 × 12,481,869.40
  4. Step 4: Simplify right side
    21,005,920.60x = 393,289,736,333,954.44
  5. Step 5: Solve for x
    x = 393,289,736,333,954.44/21,005,920.60
  6. Step 6: Final answer
    x = 18,722,804.10

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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.