Home / 13,355.28-18,429.12-9,812.34

Finding the Fourth Proportional to 13,355.28, 18,429.12 and 9,812.34

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Solution

The fourth proportional to 13,355.28, 18,429.12 and 9,812.34 is: 13,540.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.28 : 18,429.12 = 9,812.34 : x
  2. Step 2: Convert to fraction form
    13,355.28/18,429.12 = 9,812.34/x
  3. Step 3: Cross multiply
    13,355.28x = 18,429.12 × 9,812.34
  4. Step 4: Simplify right side
    13,355.28x = 180,832,791.34
  5. Step 5: Solve for x
    x = 180,832,791.34/13,355.28
  6. Step 6: Final answer
    x = 13,540.17

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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.