Home / 21,555.01-29,741.45-12,600.78

Finding the Fourth Proportional to 21,555.01, 29,741.45 and 12,600.78

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Solution

The fourth proportional to 21,555.01, 29,741.45 and 12,600.78 is: 17,386.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.01 : 29,741.45 = 12,600.78 : x
  2. Step 2: Convert to fraction form
    21,555.01/29,741.45 = 12,600.78/x
  3. Step 3: Cross multiply
    21,555.01x = 29,741.45 × 12,600.78
  4. Step 4: Simplify right side
    21,555.01x = 374,765,468.33
  5. Step 5: Solve for x
    x = 374,765,468.33/21,555.01
  6. Step 6: Final answer
    x = 17,386.47

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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.