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Finding the Fourth Proportional to 18,754.32, 28,126.62 and 5,603.16

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Solution

The fourth proportional to 18,754.32, 28,126.62 and 5,603.16 is: 8,403.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.32 : 28,126.62 = 5,603.16 : x
  2. Step 2: Convert to fraction form
    18,754.32/28,126.62 = 5,603.16/x
  3. Step 3: Cross multiply
    18,754.32x = 28,126.62 × 5,603.16
  4. Step 4: Simplify right side
    18,754.32x = 157,597,952.12
  5. Step 5: Solve for x
    x = 157,597,952.12/18,754.32
  6. Step 6: Final answer
    x = 8,403.29

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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.