Home / 28,387,881-39,175,275.78-15,510,825

Finding the Fourth Proportional to 28,387,881, 39,175,275.78 and 15,510,825

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Solution

The fourth proportional to 28,387,881, 39,175,275.78 and 15,510,825 is: 21,404,938.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387,881 : 39,175,275.78 = 15,510,825 : x
  2. Step 2: Convert to fraction form
    28,387,881/39,175,275.78 = 15,510,825/x
  3. Step 3: Cross multiply
    28,387,881x = 39,175,275.78 × 15,510,825
  4. Step 4: Simplify right side
    28,387,881x = 607,640,846,950,318.50
  5. Step 5: Solve for x
    x = 607,640,846,950,318.50/28,387,881
  6. Step 6: Final answer
    x = 21,404,938.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.