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Finding the Fourth Proportional to 28,465.78, 42,724.72 and 14,435.49

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Solution

The fourth proportional to 28,465.78, 42,724.72 and 14,435.49 is: 21,666.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,465.78 : 42,724.72 = 14,435.49 : x
  2. Step 2: Convert to fraction form
    28,465.78/42,724.72 = 14,435.49/x
  3. Step 3: Cross multiply
    28,465.78x = 42,724.72 × 14,435.49
  4. Step 4: Simplify right side
    28,465.78x = 616,752,196.14
  5. Step 5: Solve for x
    x = 616,752,196.14/28,465.78
  6. Step 6: Final answer
    x = 21,666.44

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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.