Home / 15,434.82-21,292.29-10,128.90

Finding the Fourth Proportional to 15,434.82, 21,292.29 and 10,128.90

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Solution

The fourth proportional to 15,434.82, 21,292.29 and 10,128.90 is: 13,972.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.82 : 21,292.29 = 10,128.90 : x
  2. Step 2: Convert to fraction form
    15,434.82/21,292.29 = 10,128.90/x
  3. Step 3: Cross multiply
    15,434.82x = 21,292.29 × 10,128.90
  4. Step 4: Simplify right side
    15,434.82x = 215,667,476.18
  5. Step 5: Solve for x
    x = 215,667,476.18/15,434.82
  6. Step 6: Final answer
    x = 13,972.79

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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.