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Finding the Fourth Proportional to 35,140.97, 48,489.76 and 20,990.81

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Solution

The fourth proportional to 35,140.97, 48,489.76 and 20,990.81 is: 28,964.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,140.97 : 48,489.76 = 20,990.81 : x
  2. Step 2: Convert to fraction form
    35,140.97/48,489.76 = 20,990.81/x
  3. Step 3: Cross multiply
    35,140.97x = 48,489.76 × 20,990.81
  4. Step 4: Simplify right side
    35,140.97x = 1,017,839,486.57
  5. Step 5: Solve for x
    x = 1,017,839,486.57/35,140.97
  6. Step 6: Final answer
    x = 28,964.47

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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.