Home / 13,222.73-18,246.75-7,920.47

Finding the Fourth Proportional to 13,222.73, 18,246.75 and 7,920.47

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Solution

The fourth proportional to 13,222.73, 18,246.75 and 7,920.47 is: 10,929.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,222.73 : 18,246.75 = 7,920.47 : x
  2. Step 2: Convert to fraction form
    13,222.73/18,246.75 = 7,920.47/x
  3. Step 3: Cross multiply
    13,222.73x = 18,246.75 × 7,920.47
  4. Step 4: Simplify right side
    13,222.73x = 144,522,744.74
  5. Step 5: Solve for x
    x = 144,522,744.74/13,222.73
  6. Step 6: Final answer
    x = 10,929.88

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1.5x scale

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.