Home / 13,578.24-18,734.56-7,988.16

Finding the Fourth Proportional to 13,578.24, 18,734.56 and 7,988.16

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Solution

The fourth proportional to 13,578.24, 18,734.56 and 7,988.16 is: 11,021.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.24 : 18,734.56 = 7,988.16 : x
  2. Step 2: Convert to fraction form
    13,578.24/18,734.56 = 7,988.16/x
  3. Step 3: Cross multiply
    13,578.24x = 18,734.56 × 7,988.16
  4. Step 4: Simplify right side
    13,578.24x = 149,654,662.81
  5. Step 5: Solve for x
    x = 149,654,662.81/13,578.24
  6. Step 6: Final answer
    x = 11,021.65

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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.