Home / 13,981.79-20,972.90-7,394.36

Finding the Fourth Proportional to 13,981.79, 20,972.90 and 7,394.36

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Solution

The fourth proportional to 13,981.79, 20,972.90 and 7,394.36 is: 11,091.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.79 : 20,972.90 = 7,394.36 : x
  2. Step 2: Convert to fraction form
    13,981.79/20,972.90 = 7,394.36/x
  3. Step 3: Cross multiply
    13,981.79x = 20,972.90 × 7,394.36
  4. Step 4: Simplify right side
    13,981.79x = 155,081,086.47
  5. Step 5: Solve for x
    x = 155,081,086.47/13,981.79
  6. Step 6: Final answer
    x = 11,091.65

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1.5x scale

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.