Home / 11,121.57-15,353.28-7,603.20

Finding the Fourth Proportional to 11,121.57, 15,353.28 and 7,603.20

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Solution

The fourth proportional to 11,121.57, 15,353.28 and 7,603.20 is: 10,496.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.57 : 15,353.28 = 7,603.20 : x
  2. Step 2: Convert to fraction form
    11,121.57/15,353.28 = 7,603.20/x
  3. Step 3: Cross multiply
    11,121.57x = 15,353.28 × 7,603.20
  4. Step 4: Simplify right side
    11,121.57x = 116,734,058.50
  5. Step 5: Solve for x
    x = 116,734,058.50/11,121.57
  6. Step 6: Final answer
    x = 10,496.19

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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.