Home / 20,664.70-31,005.15-7,518.40

Finding the Fourth Proportional to 20,664.70, 31,005.15 and 7,518.40

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Solution

The fourth proportional to 20,664.70, 31,005.15 and 7,518.40 is: 11,280.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.70 : 31,005.15 = 7,518.40 : x
  2. Step 2: Convert to fraction form
    20,664.70/31,005.15 = 7,518.40/x
  3. Step 3: Cross multiply
    20,664.70x = 31,005.15 × 7,518.40
  4. Step 4: Simplify right side
    20,664.70x = 233,109,119.76
  5. Step 5: Solve for x
    x = 233,109,119.76/20,664.70
  6. Step 6: Final answer
    x = 11,280.55

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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.