Home / 18,721,203.85-28,081,805.78-15,319,981.45

Finding the Fourth Proportional to 18,721,203.85, 28,081,805.78 and 15,319,981.45

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Solution

The fourth proportional to 18,721,203.85, 28,081,805.78 and 15,319,981.45 is: 22,979,972.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,203.85 : 28,081,805.78 = 15,319,981.45 : x
  2. Step 2: Convert to fraction form
    18,721,203.85/28,081,805.78 = 15,319,981.45/x
  3. Step 3: Cross multiply
    18,721,203.85x = 28,081,805.78 × 15,319,981.45
  4. Step 4: Simplify right side
    18,721,203.85x = 430,212,743,555,502.81
  5. Step 5: Solve for x
    x = 430,212,743,555,502.81/18,721,203.85
  6. Step 6: Final answer
    x = 22,979,972.18

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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.