Home / 21,591.32-29,798.14-12,638.28

Finding the Fourth Proportional to 21,591.32, 29,798.14 and 12,638.28

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Solution

The fourth proportional to 21,591.32, 29,798.14 and 12,638.28 is: 17,442.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591.32 : 29,798.14 = 12,638.28 : x
  2. Step 2: Convert to fraction form
    21,591.32/29,798.14 = 12,638.28/x
  3. Step 3: Cross multiply
    21,591.32x = 29,798.14 × 12,638.28
  4. Step 4: Simplify right side
    21,591.32x = 376,597,236.80
  5. Step 5: Solve for x
    x = 376,597,236.80/21,591.32
  6. Step 6: Final answer
    x = 17,442.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.