Home / 37,638.40-51,947.76-21,720.64

Finding the Fourth Proportional to 37,638.40, 51,947.76 and 21,720.64

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Solution

The fourth proportional to 37,638.40, 51,947.76 and 21,720.64 is: 29,978.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,638.40 : 51,947.76 = 21,720.64 : x
  2. Step 2: Convert to fraction form
    37,638.40/51,947.76 = 21,720.64/x
  3. Step 3: Cross multiply
    37,638.40x = 51,947.76 × 21,720.64
  4. Step 4: Simplify right side
    37,638.40x = 1,128,338,593.77
  5. Step 5: Solve for x
    x = 1,128,338,593.77/37,638.40
  6. Step 6: Final answer
    x = 29,978.39

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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.