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Finding the Fourth Proportional to 18,751.34, 28,127.00 and 7,656.08

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Solution

The fourth proportional to 18,751.34, 28,127.00 and 7,656.08 is: 11,484.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.34 : 28,127.00 = 7,656.08 : x
  2. Step 2: Convert to fraction form
    18,751.34/28,127.00 = 7,656.08/x
  3. Step 3: Cross multiply
    18,751.34x = 28,127.00 × 7,656.08
  4. Step 4: Simplify right side
    18,751.34x = 215,342,440.67
  5. Step 5: Solve for x
    x = 215,342,440.67/18,751.34
  6. Step 6: Final answer
    x = 11,484.11

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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.