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Finding the Fourth Proportional to 18,754.08, 28,128.96 and 4,904.16

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Solution

The fourth proportional to 18,754.08, 28,128.96 and 4,904.16 is: 7,355.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.08 : 28,128.96 = 4,904.16 : x
  2. Step 2: Convert to fraction form
    18,754.08/28,128.96 = 4,904.16/x
  3. Step 3: Cross multiply
    18,754.08x = 28,128.96 × 4,904.16
  4. Step 4: Simplify right side
    18,754.08x = 137,948,920.47
  5. Step 5: Solve for x
    x = 137,948,920.47/18,754.08
  6. Step 6: Final answer
    x = 7,355.68

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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.