Home / 21,764.30-30,036.02-12,809.75

Finding the Fourth Proportional to 21,764.30, 30,036.02 and 12,809.75

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Solution

The fourth proportional to 21,764.30, 30,036.02 and 12,809.75 is: 17,678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.30 : 30,036.02 = 12,809.75 : x
  2. Step 2: Convert to fraction form
    21,764.30/30,036.02 = 12,809.75/x
  3. Step 3: Cross multiply
    21,764.30x = 30,036.02 × 12,809.75
  4. Step 4: Simplify right side
    21,764.30x = 384,753,692.97
  5. Step 5: Solve for x
    x = 384,753,692.97/21,764.30
  6. Step 6: Final answer
    x = 17,678.21

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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.