Home / 21,627.60-29,840.99-13,129.51

Finding the Fourth Proportional to 21,627.60, 29,840.99 and 13,129.51

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Solution

The fourth proportional to 21,627.60, 29,840.99 and 13,129.51 is: 18,115.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,627.60 : 29,840.99 = 13,129.51 : x
  2. Step 2: Convert to fraction form
    21,627.60/29,840.99 = 13,129.51/x
  3. Step 3: Cross multiply
    21,627.60x = 29,840.99 × 13,129.51
  4. Step 4: Simplify right side
    21,627.60x = 391,797,534.84
  5. Step 5: Solve for x
    x = 391,797,534.84/21,627.60
  6. Step 6: Final answer
    x = 18,115.63

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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.