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Finding the Fourth Proportional to 20,993.46, 28,946.70 and 16,741.20

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Solution

The fourth proportional to 20,993.46, 28,946.70 and 16,741.20 is: 23,083.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.46 : 28,946.70 = 16,741.20 : x
  2. Step 2: Convert to fraction form
    20,993.46/28,946.70 = 16,741.20/x
  3. Step 3: Cross multiply
    20,993.46x = 28,946.70 × 16,741.20
  4. Step 4: Simplify right side
    20,993.46x = 484,602,494.04
  5. Step 5: Solve for x
    x = 484,602,494.04/20,993.46
  6. Step 6: Final answer
    x = 23,083.50

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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.