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Finding the Fourth Proportional to 28,364.30, 42,542.78 and 9,643.58

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Solution

The fourth proportional to 28,364.30, 42,542.78 and 9,643.58 is: 14,464.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.30 : 42,542.78 = 9,643.58 : x
  2. Step 2: Convert to fraction form
    28,364.30/42,542.78 = 9,643.58/x
  3. Step 3: Cross multiply
    28,364.30x = 42,542.78 × 9,643.58
  4. Step 4: Simplify right side
    28,364.30x = 410,264,702.35
  5. Step 5: Solve for x
    x = 410,264,702.35/28,364.30
  6. Step 6: Final answer
    x = 14,464.12

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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.