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Finding the Fourth Proportional to 8,619.90, 11,897.01 and 5,082.90

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Solution

The fourth proportional to 8,619.90, 11,897.01 and 5,082.90 is: 7,015.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.90 : 11,897.01 = 5,082.90 : x
  2. Step 2: Convert to fraction form
    8,619.90/11,897.01 = 5,082.90/x
  3. Step 3: Cross multiply
    8,619.90x = 11,897.01 × 5,082.90
  4. Step 4: Simplify right side
    8,619.90x = 60,471,312.13
  5. Step 5: Solve for x
    x = 60,471,312.13/8,619.90
  6. Step 6: Final answer
    x = 7,015.31

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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.