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Finding the Fourth Proportional to 18,803.32, 28,203.36 and 7,116.64

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Solution

The fourth proportional to 18,803.32, 28,203.36 and 7,116.64 is: 10,674.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.32 : 28,203.36 = 7,116.64 : x
  2. Step 2: Convert to fraction form
    18,803.32/28,203.36 = 7,116.64/x
  3. Step 3: Cross multiply
    18,803.32x = 28,203.36 × 7,116.64
  4. Step 4: Simplify right side
    18,803.32x = 200,713,159.91
  5. Step 5: Solve for x
    x = 200,713,159.91/18,803.32
  6. Step 6: Final answer
    x = 10,674.35

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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.