Home / 21,487.12-29,623.08-15,911.44

Finding the Fourth Proportional to 21,487.12, 29,623.08 and 15,911.44

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Solution

The fourth proportional to 21,487.12, 29,623.08 and 15,911.44 is: 21,936.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,487.12 : 29,623.08 = 15,911.44 : x
  2. Step 2: Convert to fraction form
    21,487.12/29,623.08 = 15,911.44/x
  3. Step 3: Cross multiply
    21,487.12x = 29,623.08 × 15,911.44
  4. Step 4: Simplify right side
    21,487.12x = 471,345,860.04
  5. Step 5: Solve for x
    x = 471,345,860.04/21,487.12
  6. Step 6: Final answer
    x = 21,936.20

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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.