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Finding the Fourth Proportional to 20,993.75, 28,974.02 and 12,041.06

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Solution

The fourth proportional to 20,993.75, 28,974.02 and 12,041.06 is: 16,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.75 : 28,974.02 = 12,041.06 : x
  2. Step 2: Convert to fraction form
    20,993.75/28,974.02 = 12,041.06/x
  3. Step 3: Cross multiply
    20,993.75x = 28,974.02 × 12,041.06
  4. Step 4: Simplify right side
    20,993.75x = 348,877,913.26
  5. Step 5: Solve for x
    x = 348,877,913.26/20,993.75
  6. Step 6: Final answer
    x = 16,618.18

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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.