Home / 21,531.42-29,709.18-13,977.18

Finding the Fourth Proportional to 21,531.42, 29,709.18 and 13,977.18

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Solution

The fourth proportional to 21,531.42, 29,709.18 and 13,977.18 is: 19,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.42 : 29,709.18 = 13,977.18 : x
  2. Step 2: Convert to fraction form
    21,531.42/29,709.18 = 13,977.18/x
  3. Step 3: Cross multiply
    21,531.42x = 29,709.18 × 13,977.18
  4. Step 4: Simplify right side
    21,531.42x = 415,250,556.51
  5. Step 5: Solve for x
    x = 415,250,556.51/21,531.42
  6. Step 6: Final answer
    x = 19,285.80

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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.