Home / 28,470.29-39,289.31-15,723.45

Finding the Fourth Proportional to 28,470.29, 39,289.31 and 15,723.45

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Solution

The fourth proportional to 28,470.29, 39,289.31 and 15,723.45 is: 21,698.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.29 : 39,289.31 = 15,723.45 : x
  2. Step 2: Convert to fraction form
    28,470.29/39,289.31 = 15,723.45/x
  3. Step 3: Cross multiply
    28,470.29x = 39,289.31 × 15,723.45
  4. Step 4: Simplify right side
    28,470.29x = 617,763,501.32
  5. Step 5: Solve for x
    x = 617,763,501.32/28,470.29
  6. Step 6: Final answer
    x = 21,698.53

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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.