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Finding the Fourth Proportional to 8,978.99, 12,393.74 and 6,145.22

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Solution

The fourth proportional to 8,978.99, 12,393.74 and 6,145.22 is: 8,482.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.99 : 12,393.74 = 6,145.22 : x
  2. Step 2: Convert to fraction form
    8,978.99/12,393.74 = 6,145.22/x
  3. Step 3: Cross multiply
    8,978.99x = 12,393.74 × 6,145.22
  4. Step 4: Simplify right side
    8,978.99x = 76,162,305.27
  5. Step 5: Solve for x
    x = 76,162,305.27/8,978.99
  6. Step 6: Final answer
    x = 8,482.28

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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.