Home / 20,771,430.31-28,664,661.06-11,352,410.78

Finding the Fourth Proportional to 20,771,430.31, 28,664,661.06 and 11,352,410.78

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Solution

The fourth proportional to 20,771,430.31, 28,664,661.06 and 11,352,410.78 is: 15,666,374.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771,430.31 : 28,664,661.06 = 11,352,410.78 : x
  2. Step 2: Convert to fraction form
    20,771,430.31/28,664,661.06 = 11,352,410.78/x
  3. Step 3: Cross multiply
    20,771,430.31x = 28,664,661.06 × 11,352,410.78
  4. Step 4: Simplify right side
    20,771,430.31x = 325,413,007,165,828.12
  5. Step 5: Solve for x
    x = 325,413,007,165,828.12/20,771,430.31
  6. Step 6: Final answer
    x = 15,666,374.55

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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.