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Finding the Fourth Proportional to 28,298.45, 42,447.78 and 9,578.68

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Solution

The fourth proportional to 28,298.45, 42,447.78 and 9,578.68 is: 14,368.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,298.45 : 42,447.78 = 9,578.68 : x
  2. Step 2: Convert to fraction form
    28,298.45/42,447.78 = 9,578.68/x
  3. Step 3: Cross multiply
    28,298.45x = 42,447.78 × 9,578.68
  4. Step 4: Simplify right side
    28,298.45x = 406,593,595.21
  5. Step 5: Solve for x
    x = 406,593,595.21/28,298.45
  6. Step 6: Final answer
    x = 14,368.05

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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.