Home / 28,470.29-39,289.55-15,723.41

Finding the Fourth Proportional to 28,470.29, 39,289.55 and 15,723.41

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Solution

The fourth proportional to 28,470.29, 39,289.55 and 15,723.41 is: 21,698.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.29 : 39,289.55 = 15,723.41 : x
  2. Step 2: Convert to fraction form
    28,470.29/39,289.55 = 15,723.41/x
  3. Step 3: Cross multiply
    28,470.29x = 39,289.55 × 15,723.41
  4. Step 4: Simplify right side
    28,470.29x = 617,765,428.30
  5. Step 5: Solve for x
    x = 617,765,428.30/28,470.29
  6. Step 6: Final answer
    x = 21,698.60

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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.