Home / 21,696.57-29,937.47-13,315.77

Finding the Fourth Proportional to 21,696.57, 29,937.47 and 13,315.77

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Solution

The fourth proportional to 21,696.57, 29,937.47 and 13,315.77 is: 18,373.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,696.57 : 29,937.47 = 13,315.77 : x
  2. Step 2: Convert to fraction form
    21,696.57/29,937.47 = 13,315.77/x
  3. Step 3: Cross multiply
    21,696.57x = 29,937.47 × 13,315.77
  4. Step 4: Simplify right side
    21,696.57x = 398,640,398.32
  5. Step 5: Solve for x
    x = 398,640,398.32/21,696.57
  6. Step 6: Final answer
    x = 18,373.43

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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.