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Finding the Fourth Proportional to 18,820.98, 28,232.10 and 7,135.02

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Solution

The fourth proportional to 18,820.98, 28,232.10 and 7,135.02 is: 10,702.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.98 : 28,232.10 = 7,135.02 : x
  2. Step 2: Convert to fraction form
    18,820.98/28,232.10 = 7,135.02/x
  3. Step 3: Cross multiply
    18,820.98x = 28,232.10 × 7,135.02
  4. Step 4: Simplify right side
    18,820.98x = 201,436,598.14
  5. Step 5: Solve for x
    x = 201,436,598.14/18,820.98
  6. Step 6: Final answer
    x = 10,702.77

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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.