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Finding the Fourth Proportional to 28,102.36, 42,139.36 and 9,375.76

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Solution

The fourth proportional to 28,102.36, 42,139.36 and 9,375.76 is: 14,058.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.36 : 42,139.36 = 9,375.76 : x
  2. Step 2: Convert to fraction form
    28,102.36/42,139.36 = 9,375.76/x
  3. Step 3: Cross multiply
    28,102.36x = 42,139.36 × 9,375.76
  4. Step 4: Simplify right side
    28,102.36x = 395,088,525.91
  5. Step 5: Solve for x
    x = 395,088,525.91/28,102.36
  6. Step 6: Final answer
    x = 14,058.91

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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.