Home / 28,259.88-39,000.45-15,684.63

Finding the Fourth Proportional to 28,259.88, 39,000.45 and 15,684.63

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Solution

The fourth proportional to 28,259.88, 39,000.45 and 15,684.63 is: 21,645.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,259.88 : 39,000.45 = 15,684.63 : x
  2. Step 2: Convert to fraction form
    28,259.88/39,000.45 = 15,684.63/x
  3. Step 3: Cross multiply
    28,259.88x = 39,000.45 × 15,684.63
  4. Step 4: Simplify right side
    28,259.88x = 611,707,433.08
  5. Step 5: Solve for x
    x = 611,707,433.08/28,259.88
  6. Step 6: Final answer
    x = 21,645.79

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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.