Home / 8,619.47-11,890.79-7,373.90

Finding the Fourth Proportional to 8,619.47, 11,890.79 and 7,373.90

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Solution

The fourth proportional to 8,619.47, 11,890.79 and 7,373.90 is: 10,172.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.47 : 11,890.79 = 7,373.90 : x
  2. Step 2: Convert to fraction form
    8,619.47/11,890.79 = 7,373.90/x
  3. Step 3: Cross multiply
    8,619.47x = 11,890.79 × 7,373.90
  4. Step 4: Simplify right side
    8,619.47x = 87,681,499.95
  5. Step 5: Solve for x
    x = 87,681,499.95/8,619.47
  6. Step 6: Final answer
    x = 10,172.50

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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.