Home / 21,472.09-29,617.84-15,512.51

Finding the Fourth Proportional to 21,472.09, 29,617.84 and 15,512.51

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Solution

The fourth proportional to 21,472.09, 29,617.84 and 15,512.51 is: 21,397.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,472.09 : 29,617.84 = 15,512.51 : x
  2. Step 2: Convert to fraction form
    21,472.09/29,617.84 = 15,512.51/x
  3. Step 3: Cross multiply
    21,472.09x = 29,617.84 × 15,512.51
  4. Step 4: Simplify right side
    21,472.09x = 459,447,039.18
  5. Step 5: Solve for x
    x = 459,447,039.18/21,472.09
  6. Step 6: Final answer
    x = 21,397.41

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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.