Home / 21,243.84-29,315.30-11,812.20

Finding the Fourth Proportional to 21,243.84, 29,315.30 and 11,812.20

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Solution

The fourth proportional to 21,243.84, 29,315.30 and 11,812.20 is: 16,300.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.84 : 29,315.30 = 11,812.20 : x
  2. Step 2: Convert to fraction form
    21,243.84/29,315.30 = 11,812.20/x
  3. Step 3: Cross multiply
    21,243.84x = 29,315.30 × 11,812.20
  4. Step 4: Simplify right side
    21,243.84x = 346,278,127.60
  5. Step 5: Solve for x
    x = 346,278,127.60/21,243.84
  6. Step 6: Final answer
    x = 16,300.17

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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.