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Finding the Fourth Proportional to 8,620.40, 11,897.70 and 5,083.40

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Solution

The fourth proportional to 8,620.40, 11,897.70 and 5,083.40 is: 7,016.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.40 : 11,897.70 = 5,083.40 : x
  2. Step 2: Convert to fraction form
    8,620.40/11,897.70 = 5,083.40/x
  3. Step 3: Cross multiply
    8,620.40x = 11,897.70 × 5,083.40
  4. Step 4: Simplify right side
    8,620.40x = 60,480,768.18
  5. Step 5: Solve for x
    x = 60,480,768.18/8,620.40
  6. Step 6: Final answer
    x = 7,016.00

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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.