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Finding the Fourth Proportional to 8,618.03, 11,897.61 and 5,215.68

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Solution

The fourth proportional to 8,618.03, 11,897.61 and 5,215.68 is: 7,200.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.03 : 11,897.61 = 5,215.68 : x
  2. Step 2: Convert to fraction form
    8,618.03/11,897.61 = 5,215.68/x
  3. Step 3: Cross multiply
    8,618.03x = 11,897.61 × 5,215.68
  4. Step 4: Simplify right side
    8,618.03x = 62,054,126.52
  5. Step 5: Solve for x
    x = 62,054,126.52/8,618.03
  6. Step 6: Final answer
    x = 7,200.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.