Home / 20,770,156.80-31,155,235.20-11,812,204.80

Finding the Fourth Proportional to 20,770,156.80, 31,155,235.20 and 11,812,204.80

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Solution

The fourth proportional to 20,770,156.80, 31,155,235.20 and 11,812,204.80 is: 17,718,307.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770,156.80 : 31,155,235.20 = 11,812,204.80 : x
  2. Step 2: Convert to fraction form
    20,770,156.80/31,155,235.20 = 11,812,204.80/x
  3. Step 3: Cross multiply
    20,770,156.80x = 31,155,235.20 × 11,812,204.80
  4. Step 4: Simplify right side
    20,770,156.80x = 368,012,018,774,569
  5. Step 5: Solve for x
    x = 368,012,018,774,569/20,770,156.80
  6. Step 6: Final answer
    x = 17,718,307.20

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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.