Home / 21,556.11-29,746.88-12,480.22

Finding the Fourth Proportional to 21,556.11, 29,746.88 and 12,480.22

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Solution

The fourth proportional to 21,556.11, 29,746.88 and 12,480.22 is: 17,222.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,556.11 : 29,746.88 = 12,480.22 : x
  2. Step 2: Convert to fraction form
    21,556.11/29,746.88 = 12,480.22/x
  3. Step 3: Cross multiply
    21,556.11x = 29,746.88 × 12,480.22
  4. Step 4: Simplify right side
    21,556.11x = 371,247,606.71
  5. Step 5: Solve for x
    x = 371,247,606.71/21,556.11
  6. Step 6: Final answer
    x = 17,222.38

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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.