Home / 28,747.86-39,690.27-19,688.41

Finding the Fourth Proportional to 28,747.86, 39,690.27 and 19,688.41

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Solution

The fourth proportional to 28,747.86, 39,690.27 and 19,688.41 is: 27,182.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,747.86 : 39,690.27 = 19,688.41 : x
  2. Step 2: Convert to fraction form
    28,747.86/39,690.27 = 19,688.41/x
  3. Step 3: Cross multiply
    28,747.86x = 39,690.27 × 19,688.41
  4. Step 4: Simplify right side
    28,747.86x = 781,438,259.55
  5. Step 5: Solve for x
    x = 781,438,259.55/28,747.86
  6. Step 6: Final answer
    x = 27,182.49

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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.