Home / 21,082.15-31,469.42-18,421.93

Finding the Fourth Proportional to 21,082.15, 31,469.42 and 18,421.93

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Solution

The fourth proportional to 21,082.15, 31,469.42 and 18,421.93 is: 27,498.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,082.15 : 31,469.42 = 18,421.93 : x
  2. Step 2: Convert to fraction form
    21,082.15/31,469.42 = 18,421.93/x
  3. Step 3: Cross multiply
    21,082.15x = 31,469.42 × 18,421.93
  4. Step 4: Simplify right side
    21,082.15x = 579,727,537.77
  5. Step 5: Solve for x
    x = 579,727,537.77/21,082.15
  6. Step 6: Final answer
    x = 27,498.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.