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Finding the Fourth Proportional to 28,506.13, 42,759.80 and 9,786.08

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Solution

The fourth proportional to 28,506.13, 42,759.80 and 9,786.08 is: 14,679.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,506.13 : 42,759.80 = 9,786.08 : x
  2. Step 2: Convert to fraction form
    28,506.13/42,759.80 = 9,786.08/x
  3. Step 3: Cross multiply
    28,506.13x = 42,759.80 × 9,786.08
  4. Step 4: Simplify right side
    28,506.13x = 418,450,823.58
  5. Step 5: Solve for x
    x = 418,450,823.58/28,506.13
  6. Step 6: Final answer
    x = 14,679.33

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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.