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Finding the Fourth Proportional to 28,285.68, 42,393.68 and 11,635.32

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Solution

The fourth proportional to 28,285.68, 42,393.68 and 11,635.32 is: 17,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,285.68 : 42,393.68 = 11,635.32 : x
  2. Step 2: Convert to fraction form
    28,285.68/42,393.68 = 11,635.32/x
  3. Step 3: Cross multiply
    28,285.68x = 42,393.68 × 11,635.32
  4. Step 4: Simplify right side
    28,285.68x = 493,264,032.78
  5. Step 5: Solve for x
    x = 493,264,032.78/28,285.68
  6. Step 6: Final answer
    x = 17,438.65

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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.