Home / 21,224.84-31,681.45-19,661

Finding the Fourth Proportional to 21,224.84, 31,681.45 and 19,661

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Solution

The fourth proportional to 21,224.84, 31,681.45 and 19,661 is: 29,347.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,224.84 : 31,681.45 = 19,661 : x
  2. Step 2: Convert to fraction form
    21,224.84/31,681.45 = 19,661/x
  3. Step 3: Cross multiply
    21,224.84x = 31,681.45 × 19,661
  4. Step 4: Simplify right side
    21,224.84x = 622,888,988.45
  5. Step 5: Solve for x
    x = 622,888,988.45/21,224.84
  6. Step 6: Final answer
    x = 29,347.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.