Home / 28,305.12-42,428.16-9,578.64

Finding the Fourth Proportional to 28,305.12, 42,428.16 and 9,578.64

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Solution

The fourth proportional to 28,305.12, 42,428.16 and 9,578.64 is: 14,357.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.12 : 42,428.16 = 9,578.64 : x
  2. Step 2: Convert to fraction form
    28,305.12/42,428.16 = 9,578.64/x
  3. Step 3: Cross multiply
    28,305.12x = 42,428.16 × 9,578.64
  4. Step 4: Simplify right side
    28,305.12x = 406,404,070.50
  5. Step 5: Solve for x
    x = 406,404,070.50/28,305.12
  6. Step 6: Final answer
    x = 14,357.97

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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.