Home / 20,930.10-28,883.08-11,369.87

Finding the Fourth Proportional to 20,930.10, 28,883.08 and 11,369.87

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Solution

The fourth proportional to 20,930.10, 28,883.08 and 11,369.87 is: 15,690.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.10 : 28,883.08 = 11,369.87 : x
  2. Step 2: Convert to fraction form
    20,930.10/28,883.08 = 11,369.87/x
  3. Step 3: Cross multiply
    20,930.10x = 28,883.08 × 11,369.87
  4. Step 4: Simplify right side
    20,930.10x = 328,396,842.91
  5. Step 5: Solve for x
    x = 328,396,842.91/20,930.10
  6. Step 6: Final answer
    x = 15,690.17

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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.