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Finding the Fourth Proportional to 39,899.59, 55,061.58 and 21,750.22

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Solution

The fourth proportional to 39,899.59, 55,061.58 and 21,750.22 is: 30,015.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,899.59 : 55,061.58 = 21,750.22 : x
  2. Step 2: Convert to fraction form
    39,899.59/55,061.58 = 21,750.22/x
  3. Step 3: Cross multiply
    39,899.59x = 55,061.58 × 21,750.22
  4. Step 4: Simplify right side
    39,899.59x = 1,197,601,478.55
  5. Step 5: Solve for x
    x = 1,197,601,478.55/39,899.59
  6. Step 6: Final answer
    x = 30,015.38

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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.