Home / 28,261.78-39,001.21-15,686.53

Finding the Fourth Proportional to 28,261.78, 39,001.21 and 15,686.53

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Solution

The fourth proportional to 28,261.78, 39,001.21 and 15,686.53 is: 21,647.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,261.78 : 39,001.21 = 15,686.53 : x
  2. Step 2: Convert to fraction form
    28,261.78/39,001.21 = 15,686.53/x
  3. Step 3: Cross multiply
    28,261.78x = 39,001.21 × 15,686.53
  4. Step 4: Simplify right side
    28,261.78x = 611,793,513.98
  5. Step 5: Solve for x
    x = 611,793,513.98/28,261.78
  6. Step 6: Final answer
    x = 21,647.38

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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.