Home / 18,987.28-26,202.42-10,603.78

Finding the Fourth Proportional to 18,987.28, 26,202.42 and 10,603.78

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Solution

The fourth proportional to 18,987.28, 26,202.42 and 10,603.78 is: 14,633.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.28 : 26,202.42 = 10,603.78 : x
  2. Step 2: Convert to fraction form
    18,987.28/26,202.42 = 10,603.78/x
  3. Step 3: Cross multiply
    18,987.28x = 26,202.42 × 10,603.78
  4. Step 4: Simplify right side
    18,987.28x = 277,844,697.15
  5. Step 5: Solve for x
    x = 277,844,697.15/18,987.28
  6. Step 6: Final answer
    x = 14,633.20

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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.