Home / 21,551.81-29,741.51-12,120.38

Finding the Fourth Proportional to 21,551.81, 29,741.51 and 12,120.38

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Solution

The fourth proportional to 21,551.81, 29,741.51 and 12,120.38 is: 16,726.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,551.81 : 29,741.51 = 12,120.38 : x
  2. Step 2: Convert to fraction form
    21,551.81/29,741.51 = 12,120.38/x
  3. Step 3: Cross multiply
    21,551.81x = 29,741.51 × 12,120.38
  4. Step 4: Simplify right side
    21,551.81x = 360,478,193.66
  5. Step 5: Solve for x
    x = 360,478,193.66/21,551.81
  6. Step 6: Final answer
    x = 16,726.12

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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.