Home / 54,579.90-81,873.63-21,288.90

Finding the Fourth Proportional to 54,579.90, 81,873.63 and 21,288.90

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Solution

The fourth proportional to 54,579.90, 81,873.63 and 21,288.90 is: 31,934.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,579.90 : 81,873.63 = 21,288.90 : x
  2. Step 2: Convert to fraction form
    54,579.90/81,873.63 = 21,288.90/x
  3. Step 3: Cross multiply
    54,579.90x = 81,873.63 × 21,288.90
  4. Step 4: Simplify right side
    54,579.90x = 1,742,999,521.71
  5. Step 5: Solve for x
    x = 1,742,999,521.71/54,579.90
  6. Step 6: Final answer
    x = 31,934.82

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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.