Home / 21,039.36-29,040.48-13,077.60

Finding the Fourth Proportional to 21,039.36, 29,040.48 and 13,077.60

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Solution

The fourth proportional to 21,039.36, 29,040.48 and 13,077.60 is: 18,050.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.36 : 29,040.48 = 13,077.60 : x
  2. Step 2: Convert to fraction form
    21,039.36/29,040.48 = 13,077.60/x
  3. Step 3: Cross multiply
    21,039.36x = 29,040.48 × 13,077.60
  4. Step 4: Simplify right side
    21,039.36x = 379,779,781.25
  5. Step 5: Solve for x
    x = 379,779,781.25/21,039.36
  6. Step 6: Final answer
    x = 18,050.92

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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.