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Finding the Fourth Proportional to 15,210.94, 20,983.70 and 9,240.44

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Solution

The fourth proportional to 15,210.94, 20,983.70 and 9,240.44 is: 12,747.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,210.94 : 20,983.70 = 9,240.44 : x
  2. Step 2: Convert to fraction form
    15,210.94/20,983.70 = 9,240.44/x
  3. Step 3: Cross multiply
    15,210.94x = 20,983.70 × 9,240.44
  4. Step 4: Simplify right side
    15,210.94x = 193,898,620.83
  5. Step 5: Solve for x
    x = 193,898,620.83/15,210.94
  6. Step 6: Final answer
    x = 12,747.31

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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.