Home / 21,002.08-29,021.44-15,327.20

Finding the Fourth Proportional to 21,002.08, 29,021.44 and 15,327.20

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Solution

The fourth proportional to 21,002.08, 29,021.44 and 15,327.20 is: 21,179.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.08 : 29,021.44 = 15,327.20 : x
  2. Step 2: Convert to fraction form
    21,002.08/29,021.44 = 15,327.20/x
  3. Step 3: Cross multiply
    21,002.08x = 29,021.44 × 15,327.20
  4. Step 4: Simplify right side
    21,002.08x = 444,817,415.17
  5. Step 5: Solve for x
    x = 444,817,415.17/21,002.08
  6. Step 6: Final answer
    x = 21,179.68

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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.