Home / 18,138.21-27,210.80-6,291.53

Finding the Fourth Proportional to 18,138.21, 27,210.80 and 6,291.53

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Solution

The fourth proportional to 18,138.21, 27,210.80 and 6,291.53 is: 9,438.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.21 : 27,210.80 = 6,291.53 : x
  2. Step 2: Convert to fraction form
    18,138.21/27,210.80 = 6,291.53/x
  3. Step 3: Cross multiply
    18,138.21x = 27,210.80 × 6,291.53
  4. Step 4: Simplify right side
    18,138.21x = 171,197,397.01
  5. Step 5: Solve for x
    x = 171,197,397.01/18,138.21
  6. Step 6: Final answer
    x = 9,438.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.