Home / 21,143.04-29,162.88-12,744.96

Finding the Fourth Proportional to 21,143.04, 29,162.88 and 12,744.96

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Solution

The fourth proportional to 21,143.04, 29,162.88 and 12,744.96 is: 17,579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.04 : 29,162.88 = 12,744.96 : x
  2. Step 2: Convert to fraction form
    21,143.04/29,162.88 = 12,744.96/x
  3. Step 3: Cross multiply
    21,143.04x = 29,162.88 × 12,744.96
  4. Step 4: Simplify right side
    21,143.04x = 371,679,739.08
  5. Step 5: Solve for x
    x = 371,679,739.08/21,143.04
  6. Step 6: Final answer
    x = 17,579.30

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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.