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Finding the Fourth Proportional to 28,653.40, 42,978.12 and 8,930.08

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Solution

The fourth proportional to 28,653.40, 42,978.12 and 8,930.08 is: 13,394.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,653.40 : 42,978.12 = 8,930.08 : x
  2. Step 2: Convert to fraction form
    28,653.40/42,978.12 = 8,930.08/x
  3. Step 3: Cross multiply
    28,653.40x = 42,978.12 × 8,930.08
  4. Step 4: Simplify right side
    28,653.40x = 383,798,049.85
  5. Step 5: Solve for x
    x = 383,798,049.85/28,653.40
  6. Step 6: Final answer
    x = 13,394.50

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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.