Home / 20,801.08-28,705.52-11,369.64

Finding the Fourth Proportional to 20,801.08, 28,705.52 and 11,369.64

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Solution

The fourth proportional to 20,801.08, 28,705.52 and 11,369.64 is: 15,690.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.08 : 28,705.52 = 11,369.64 : x
  2. Step 2: Convert to fraction form
    20,801.08/28,705.52 = 11,369.64/x
  3. Step 3: Cross multiply
    20,801.08x = 28,705.52 × 11,369.64
  4. Step 4: Simplify right side
    20,801.08x = 326,371,428.41
  5. Step 5: Solve for x
    x = 326,371,428.41/20,801.08
  6. Step 6: Final answer
    x = 15,690.12

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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.