Home / 21,118.74-29,117.37-13,551.72

Finding the Fourth Proportional to 21,118.74, 29,117.37 and 13,551.72

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Solution

The fourth proportional to 21,118.74, 29,117.37 and 13,551.72 is: 18,684.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.74 : 29,117.37 = 13,551.72 : x
  2. Step 2: Convert to fraction form
    21,118.74/29,117.37 = 13,551.72/x
  3. Step 3: Cross multiply
    21,118.74x = 29,117.37 × 13,551.72
  4. Step 4: Simplify right side
    21,118.74x = 394,590,445.38
  5. Step 5: Solve for x
    x = 394,590,445.38/21,118.74
  6. Step 6: Final answer
    x = 18,684.37

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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.