Home / 21,309.68-29,407.75-11,877.23

Finding the Fourth Proportional to 21,309.68, 29,407.75 and 11,877.23

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Solution

The fourth proportional to 21,309.68, 29,407.75 and 11,877.23 is: 16,390.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.68 : 29,407.75 = 11,877.23 : x
  2. Step 2: Convert to fraction form
    21,309.68/29,407.75 = 11,877.23/x
  3. Step 3: Cross multiply
    21,309.68x = 29,407.75 × 11,877.23
  4. Step 4: Simplify right side
    21,309.68x = 349,282,610.53
  5. Step 5: Solve for x
    x = 349,282,610.53/21,309.68
  6. Step 6: Final answer
    x = 16,390.80

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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.