Home / 20,440.23-30,681.80-18,115.11

Finding the Fourth Proportional to 20,440.23, 30,681.80 and 18,115.11

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Solution

The fourth proportional to 20,440.23, 30,681.80 and 18,115.11 is: 27,191.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.23 : 30,681.80 = 18,115.11 : x
  2. Step 2: Convert to fraction form
    20,440.23/30,681.80 = 18,115.11/x
  3. Step 3: Cross multiply
    20,440.23x = 30,681.80 × 18,115.11
  4. Step 4: Simplify right side
    20,440.23x = 555,804,091.42
  5. Step 5: Solve for x
    x = 555,804,091.42/20,440.23
  6. Step 6: Final answer
    x = 27,191.68

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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.