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Finding the Fourth Proportional to 20,964.64, 28,927.92 and 12,010

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Solution

The fourth proportional to 20,964.64, 28,927.92 and 12,010 is: 16,571.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.64 : 28,927.92 = 12,010 : x
  2. Step 2: Convert to fraction form
    20,964.64/28,927.92 = 12,010/x
  3. Step 3: Cross multiply
    20,964.64x = 28,927.92 × 12,010
  4. Step 4: Simplify right side
    20,964.64x = 347,424,319.20
  5. Step 5: Solve for x
    x = 347,424,319.20/20,964.64
  6. Step 6: Final answer
    x = 16,571.92

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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.