Home / 21,812.49-30,103.47-12,862.89

Finding the Fourth Proportional to 21,812.49, 30,103.47 and 12,862.89

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Solution

The fourth proportional to 21,812.49, 30,103.47 and 12,862.89 is: 17,752.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,812.49 : 30,103.47 = 12,862.89 : x
  2. Step 2: Convert to fraction form
    21,812.49/30,103.47 = 12,862.89/x
  3. Step 3: Cross multiply
    21,812.49x = 30,103.47 × 12,862.89
  4. Step 4: Simplify right side
    21,812.49x = 387,217,623.23
  5. Step 5: Solve for x
    x = 387,217,623.23/21,812.49
  6. Step 6: Final answer
    x = 17,752.11

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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.