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Finding the Fourth Proportional to 19,216.32, 28,832.16 and 6,905.28

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Solution

The fourth proportional to 19,216.32, 28,832.16 and 6,905.28 is: 10,360.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,216.32 : 28,832.16 = 6,905.28 : x
  2. Step 2: Convert to fraction form
    19,216.32/28,832.16 = 6,905.28/x
  3. Step 3: Cross multiply
    19,216.32x = 28,832.16 × 6,905.28
  4. Step 4: Simplify right side
    19,216.32x = 199,094,137.80
  5. Step 5: Solve for x
    x = 199,094,137.80/19,216.32
  6. Step 6: Final answer
    x = 10,360.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.