Home / 13,278.56-18,324.08-7,228.72

Finding the Fourth Proportional to 13,278.56, 18,324.08 and 7,228.72

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Solution

The fourth proportional to 13,278.56, 18,324.08 and 7,228.72 is: 9,975.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.56 : 18,324.08 = 7,228.72 : x
  2. Step 2: Convert to fraction form
    13,278.56/18,324.08 = 7,228.72/x
  3. Step 3: Cross multiply
    13,278.56x = 18,324.08 × 7,228.72
  4. Step 4: Simplify right side
    13,278.56x = 132,459,643.58
  5. Step 5: Solve for x
    x = 132,459,643.58/13,278.56
  6. Step 6: Final answer
    x = 9,975.45

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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.