Home / 21,122.36-29,145.31-12,627.92

Finding the Fourth Proportional to 21,122.36, 29,145.31 and 12,627.92

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Solution

The fourth proportional to 21,122.36, 29,145.31 and 12,627.92 is: 17,424.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.36 : 29,145.31 = 12,627.92 : x
  2. Step 2: Convert to fraction form
    21,122.36/29,145.31 = 12,627.92/x
  3. Step 3: Cross multiply
    21,122.36x = 29,145.31 × 12,627.92
  4. Step 4: Simplify right side
    21,122.36x = 368,044,643.06
  5. Step 5: Solve for x
    x = 368,044,643.06/21,122.36
  6. Step 6: Final answer
    x = 17,424.41

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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.