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Finding the Fourth Proportional to 28,336.78, 42,507.56 and 8,615.50

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Solution

The fourth proportional to 28,336.78, 42,507.56 and 8,615.50 is: 12,923.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,336.78 : 42,507.56 = 8,615.50 : x
  2. Step 2: Convert to fraction form
    28,336.78/42,507.56 = 8,615.50/x
  3. Step 3: Cross multiply
    28,336.78x = 42,507.56 × 8,615.50
  4. Step 4: Simplify right side
    28,336.78x = 366,223,883.18
  5. Step 5: Solve for x
    x = 366,223,883.18/28,336.78
  6. Step 6: Final answer
    x = 12,923.98

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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.