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Finding the Fourth Proportional to 21,893.76, 32,840.82 and 9,412.92

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Solution

The fourth proportional to 21,893.76, 32,840.82 and 9,412.92 is: 14,119.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.76 : 32,840.82 = 9,412.92 : x
  2. Step 2: Convert to fraction form
    21,893.76/32,840.82 = 9,412.92/x
  3. Step 3: Cross multiply
    21,893.76x = 32,840.82 × 9,412.92
  4. Step 4: Simplify right side
    21,893.76x = 309,128,011.39
  5. Step 5: Solve for x
    x = 309,128,011.39/21,893.76
  6. Step 6: Final answer
    x = 14,119.46

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.