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Finding the Fourth Proportional to 20,263.78, 27,963.78 and 11,313.50

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Solution

The fourth proportional to 20,263.78, 27,963.78 and 11,313.50 is: 15,612.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,263.78 : 27,963.78 = 11,313.50 : x
  2. Step 2: Convert to fraction form
    20,263.78/27,963.78 = 11,313.50/x
  3. Step 3: Cross multiply
    20,263.78x = 27,963.78 × 11,313.50
  4. Step 4: Simplify right side
    20,263.78x = 316,368,225.03
  5. Step 5: Solve for x
    x = 316,368,225.03/20,263.78
  6. Step 6: Final answer
    x = 15,612.50

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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.