Home / 18,420.19-27,607.17-7,877.81

Finding the Fourth Proportional to 18,420.19, 27,607.17 and 7,877.81

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Solution

The fourth proportional to 18,420.19, 27,607.17 and 7,877.81 is: 11,806.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.19 : 27,607.17 = 7,877.81 : x
  2. Step 2: Convert to fraction form
    18,420.19/27,607.17 = 7,877.81/x
  3. Step 3: Cross multiply
    18,420.19x = 27,607.17 × 7,877.81
  4. Step 4: Simplify right side
    18,420.19x = 217,484,079.37
  5. Step 5: Solve for x
    x = 217,484,079.37/18,420.19
  6. Step 6: Final answer
    x = 11,806.83

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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.