Home / 18,721,208.60-28,081,812.90-15,319,986.20

Finding the Fourth Proportional to 18,721,208.60, 28,081,812.90 and 15,319,986.20

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Solution

The fourth proportional to 18,721,208.60, 28,081,812.90 and 15,319,986.20 is: 22,979,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,208.60 : 28,081,812.90 = 15,319,986.20 : x
  2. Step 2: Convert to fraction form
    18,721,208.60/28,081,812.90 = 15,319,986.20/x
  3. Step 3: Cross multiply
    18,721,208.60x = 28,081,812.90 × 15,319,986.20
  4. Step 4: Simplify right side
    18,721,208.60x = 430,212,986,098,981.94
  5. Step 5: Solve for x
    x = 430,212,986,098,981.94/18,721,208.60
  6. Step 6: Final answer
    x = 22,979,979.30

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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.