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Finding the Fourth Proportional to 20,993.76, 28,972.53 and 12,041.19

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Solution

The fourth proportional to 20,993.76, 28,972.53 and 12,041.19 is: 16,617.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.76 : 28,972.53 = 12,041.19 : x
  2. Step 2: Convert to fraction form
    20,993.76/28,972.53 = 12,041.19/x
  3. Step 3: Cross multiply
    20,993.76x = 28,972.53 × 12,041.19
  4. Step 4: Simplify right side
    20,993.76x = 348,863,738.51
  5. Step 5: Solve for x
    x = 348,863,738.51/20,993.76
  6. Step 6: Final answer
    x = 16,617.50

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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.