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Finding the Fourth Proportional to 27,221.40, 40,807.48 and 18,905.33

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Solution

The fourth proportional to 27,221.40, 40,807.48 and 18,905.33 is: 28,340.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,221.40 : 40,807.48 = 18,905.33 : x
  2. Step 2: Convert to fraction form
    27,221.40/40,807.48 = 18,905.33/x
  3. Step 3: Cross multiply
    27,221.40x = 40,807.48 × 18,905.33
  4. Step 4: Simplify right side
    27,221.40x = 771,478,875.87
  5. Step 5: Solve for x
    x = 771,478,875.87/27,221.40
  6. Step 6: Final answer
    x = 28,340.90

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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.