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Finding the Fourth Proportional to 19,767.96, 29,649.78 and 9,905.40

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Solution

The fourth proportional to 19,767.96, 29,649.78 and 9,905.40 is: 14,857.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,767.96 : 29,649.78 = 9,905.40 : x
  2. Step 2: Convert to fraction form
    19,767.96/29,649.78 = 9,905.40/x
  3. Step 3: Cross multiply
    19,767.96x = 29,649.78 × 9,905.40
  4. Step 4: Simplify right side
    19,767.96x = 293,692,930.81
  5. Step 5: Solve for x
    x = 293,692,930.81/19,767.96
  6. Step 6: Final answer
    x = 14,857.02

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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.