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Finding the Fourth Proportional to 12,614.63, 18,921.95 and 5,210.95

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Solution

The fourth proportional to 12,614.63, 18,921.95 and 5,210.95 is: 7,816.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,614.63 : 18,921.95 = 5,210.95 : x
  2. Step 2: Convert to fraction form
    12,614.63/18,921.95 = 5,210.95/x
  3. Step 3: Cross multiply
    12,614.63x = 18,921.95 × 5,210.95
  4. Step 4: Simplify right side
    12,614.63x = 98,601,335.35
  5. Step 5: Solve for x
    x = 98,601,335.35/12,614.63
  6. Step 6: Final answer
    x = 7,816.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.