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Finding the Fourth Proportional to 18,804.57, 28,207.63 and 15,511.53

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Solution

The fourth proportional to 18,804.57, 28,207.63 and 15,511.53 is: 23,267.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.57 : 28,207.63 = 15,511.53 : x
  2. Step 2: Convert to fraction form
    18,804.57/28,207.63 = 15,511.53/x
  3. Step 3: Cross multiply
    18,804.57x = 28,207.63 × 15,511.53
  4. Step 4: Simplify right side
    18,804.57x = 437,543,319.16
  5. Step 5: Solve for x
    x = 437,543,319.16/18,804.57
  6. Step 6: Final answer
    x = 23,267.93

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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.