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Finding the Fourth Proportional to 20,809.71, 28,710.50 and 11,733.93

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Solution

The fourth proportional to 20,809.71, 28,710.50 and 11,733.93 is: 16,188.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.71 : 28,710.50 = 11,733.93 : x
  2. Step 2: Convert to fraction form
    20,809.71/28,710.50 = 11,733.93/x
  3. Step 3: Cross multiply
    20,809.71x = 28,710.50 × 11,733.93
  4. Step 4: Simplify right side
    20,809.71x = 336,886,938.60
  5. Step 5: Solve for x
    x = 336,886,938.60/20,809.71
  6. Step 6: Final answer
    x = 16,188.93

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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.