Home / 13,222.28-18,246.66-7,918.40

Finding the Fourth Proportional to 13,222.28, 18,246.66 and 7,918.40

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Solution

The fourth proportional to 13,222.28, 18,246.66 and 7,918.40 is: 10,927.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,222.28 : 18,246.66 = 7,918.40 : x
  2. Step 2: Convert to fraction form
    13,222.28/18,246.66 = 7,918.40/x
  3. Step 3: Cross multiply
    13,222.28x = 18,246.66 × 7,918.40
  4. Step 4: Simplify right side
    13,222.28x = 144,484,352.54
  5. Step 5: Solve for x
    x = 144,484,352.54/13,222.28
  6. Step 6: Final answer
    x = 10,927.34

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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.