Home / 21,526.12-29,706.70-13,029.79

Finding the Fourth Proportional to 21,526.12, 29,706.70 and 13,029.79

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Solution

The fourth proportional to 21,526.12, 29,706.70 and 13,029.79 is: 17,981.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,526.12 : 29,706.70 = 13,029.79 : x
  2. Step 2: Convert to fraction form
    21,526.12/29,706.70 = 13,029.79/x
  3. Step 3: Cross multiply
    21,526.12x = 29,706.70 × 13,029.79
  4. Step 4: Simplify right side
    21,526.12x = 387,072,062.59
  5. Step 5: Solve for x
    x = 387,072,062.59/21,526.12
  6. Step 6: Final answer
    x = 17,981.51

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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.