Home / 28,261.12-39,000.54-15,685.87

Finding the Fourth Proportional to 28,261.12, 39,000.54 and 15,685.87

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Solution

The fourth proportional to 28,261.12, 39,000.54 and 15,685.87 is: 21,646.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,261.12 : 39,000.54 = 15,685.87 : x
  2. Step 2: Convert to fraction form
    28,261.12/39,000.54 = 15,685.87/x
  3. Step 3: Cross multiply
    28,261.12x = 39,000.54 × 15,685.87
  4. Step 4: Simplify right side
    28,261.12x = 611,757,400.37
  5. Step 5: Solve for x
    x = 611,757,400.37/28,261.12
  6. Step 6: Final answer
    x = 21,646.61

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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.