Home / 28,456.88-39,265.80-15,881.60

Finding the Fourth Proportional to 28,456.88, 39,265.80 and 15,881.60

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Solution

The fourth proportional to 28,456.88, 39,265.80 and 15,881.60 is: 21,913.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,456.88 : 39,265.80 = 15,881.60 : x
  2. Step 2: Convert to fraction form
    28,456.88/39,265.80 = 15,881.60/x
  3. Step 3: Cross multiply
    28,456.88x = 39,265.80 × 15,881.60
  4. Step 4: Simplify right side
    28,456.88x = 623,603,729.28
  5. Step 5: Solve for x
    x = 623,603,729.28/28,456.88
  6. Step 6: Final answer
    x = 21,913.99

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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.