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Finding the Fourth Proportional to 8,378.76, 11,559.15 and 5,020.50

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Solution

The fourth proportional to 8,378.76, 11,559.15 and 5,020.50 is: 6,926.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.76 : 11,559.15 = 5,020.50 : x
  2. Step 2: Convert to fraction form
    8,378.76/11,559.15 = 5,020.50/x
  3. Step 3: Cross multiply
    8,378.76x = 11,559.15 × 5,020.50
  4. Step 4: Simplify right side
    8,378.76x = 58,032,712.58
  5. Step 5: Solve for x
    x = 58,032,712.58/8,378.76
  6. Step 6: Final answer
    x = 6,926.17

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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.