Home / 21,549.82-29,739.12-11,990.47

Finding the Fourth Proportional to 21,549.82, 29,739.12 and 11,990.47

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Solution

The fourth proportional to 21,549.82, 29,739.12 and 11,990.47 is: 16,547.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,549.82 : 29,739.12 = 11,990.47 : x
  2. Step 2: Convert to fraction form
    21,549.82/29,739.12 = 11,990.47/x
  3. Step 3: Cross multiply
    21,549.82x = 29,739.12 × 11,990.47
  4. Step 4: Simplify right side
    21,549.82x = 356,586,026.19
  5. Step 5: Solve for x
    x = 356,586,026.19/21,549.82
  6. Step 6: Final answer
    x = 16,547.05

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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.