Home / 28,531.58-39,372.89-15,784.47

Finding the Fourth Proportional to 28,531.58, 39,372.89 and 15,784.47

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Solution

The fourth proportional to 28,531.58, 39,372.89 and 15,784.47 is: 21,782.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.58 : 39,372.89 = 15,784.47 : x
  2. Step 2: Convert to fraction form
    28,531.58/39,372.89 = 15,784.47/x
  3. Step 3: Cross multiply
    28,531.58x = 39,372.89 × 15,784.47
  4. Step 4: Simplify right side
    28,531.58x = 621,480,122.10
  5. Step 5: Solve for x
    x = 621,480,122.10/28,531.58
  6. Step 6: Final answer
    x = 21,782.19

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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.