Home / 21,181.80-29,218.20-14,011.92

Finding the Fourth Proportional to 21,181.80, 29,218.20 and 14,011.92

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Solution

The fourth proportional to 21,181.80, 29,218.20 and 14,011.92 is: 19,328.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.80 : 29,218.20 = 14,011.92 : x
  2. Step 2: Convert to fraction form
    21,181.80/29,218.20 = 14,011.92/x
  3. Step 3: Cross multiply
    21,181.80x = 29,218.20 × 14,011.92
  4. Step 4: Simplify right side
    21,181.80x = 409,403,080.94
  5. Step 5: Solve for x
    x = 409,403,080.94/21,181.80
  6. Step 6: Final answer
    x = 19,328.06

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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.