Home / 38,649.80-53,342.36-21,655.19

Finding the Fourth Proportional to 38,649.80, 53,342.36 and 21,655.19

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Solution

The fourth proportional to 38,649.80, 53,342.36 and 21,655.19 is: 29,887.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,649.80 : 53,342.36 = 21,655.19 : x
  2. Step 2: Convert to fraction form
    38,649.80/53,342.36 = 21,655.19/x
  3. Step 3: Cross multiply
    38,649.80x = 53,342.36 × 21,655.19
  4. Step 4: Simplify right side
    38,649.80x = 1,155,138,965.93
  5. Step 5: Solve for x
    x = 1,155,138,965.93/38,649.80
  6. Step 6: Final answer
    x = 29,887.32

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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.