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Finding the Fourth Proportional to 28,427.95, 42,642.06 and 8,706.49

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Solution

The fourth proportional to 28,427.95, 42,642.06 and 8,706.49 is: 13,059.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.95 : 42,642.06 = 8,706.49 : x
  2. Step 2: Convert to fraction form
    28,427.95/42,642.06 = 8,706.49/x
  3. Step 3: Cross multiply
    28,427.95x = 42,642.06 × 8,706.49
  4. Step 4: Simplify right side
    28,427.95x = 371,262,668.97
  5. Step 5: Solve for x
    x = 371,262,668.97/28,427.95
  6. Step 6: Final answer
    x = 13,059.78

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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.