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Finding the Fourth Proportional to 28,534.84, 42,786.30 and 8,807.80

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Solution

The fourth proportional to 28,534.84, 42,786.30 and 8,807.80 is: 13,206.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,534.84 : 42,786.30 = 8,807.80 : x
  2. Step 2: Convert to fraction form
    28,534.84/42,786.30 = 8,807.80/x
  3. Step 3: Cross multiply
    28,534.84x = 42,786.30 × 8,807.80
  4. Step 4: Simplify right side
    28,534.84x = 376,853,173.14
  5. Step 5: Solve for x
    x = 376,853,173.14/28,534.84
  6. Step 6: Final answer
    x = 13,206.77

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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.