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Finding the Fourth Proportional to 20,660.58, 28,511.04 and 11,707.86

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Solution

The fourth proportional to 20,660.58, 28,511.04 and 11,707.86 is: 16,156.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.58 : 28,511.04 = 11,707.86 : x
  2. Step 2: Convert to fraction form
    20,660.58/28,511.04 = 11,707.86/x
  3. Step 3: Cross multiply
    20,660.58x = 28,511.04 × 11,707.86
  4. Step 4: Simplify right side
    20,660.58x = 333,803,264.77
  5. Step 5: Solve for x
    x = 333,803,264.77/20,660.58
  6. Step 6: Final answer
    x = 16,156.53

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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.