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Finding the Fourth Proportional to 13,989.52, 20,983.74 and 4,755.52

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Solution

The fourth proportional to 13,989.52, 20,983.74 and 4,755.52 is: 7,133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.52 : 20,983.74 = 4,755.52 : x
  2. Step 2: Convert to fraction form
    13,989.52/20,983.74 = 4,755.52/x
  3. Step 3: Cross multiply
    13,989.52x = 20,983.74 × 4,755.52
  4. Step 4: Simplify right side
    13,989.52x = 99,788,595.24
  5. Step 5: Solve for x
    x = 99,788,595.24/13,989.52
  6. Step 6: Final answer
    x = 7,133.10

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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.