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Finding the Fourth Proportional to 20,969.84, 28,923.24 and 12,014.08

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Solution

The fourth proportional to 20,969.84, 28,923.24 and 12,014.08 is: 16,570.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.84 : 28,923.24 = 12,014.08 : x
  2. Step 2: Convert to fraction form
    20,969.84/28,923.24 = 12,014.08/x
  3. Step 3: Cross multiply
    20,969.84x = 28,923.24 × 12,014.08
  4. Step 4: Simplify right side
    20,969.84x = 347,486,119.22
  5. Step 5: Solve for x
    x = 347,486,119.22/20,969.84
  6. Step 6: Final answer
    x = 16,570.76

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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.