Home / 20,511.61-28,305.61-11,558.93

Finding the Fourth Proportional to 20,511.61, 28,305.61 and 11,558.93

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Solution

The fourth proportional to 20,511.61, 28,305.61 and 11,558.93 is: 15,951.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.61 : 28,305.61 = 11,558.93 : x
  2. Step 2: Convert to fraction form
    20,511.61/28,305.61 = 11,558.93/x
  3. Step 3: Cross multiply
    20,511.61x = 28,305.61 × 11,558.93
  4. Step 4: Simplify right side
    20,511.61x = 327,182,394.17
  5. Step 5: Solve for x
    x = 327,182,394.17/20,511.61
  6. Step 6: Final answer
    x = 15,951.08

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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.