Home / 28,470.48-39,285.60-15,895.76

Finding the Fourth Proportional to 28,470.48, 39,285.60 and 15,895.76

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Solution

The fourth proportional to 28,470.48, 39,285.60 and 15,895.76 is: 21,934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.48 : 39,285.60 = 15,895.76 : x
  2. Step 2: Convert to fraction form
    28,470.48/39,285.60 = 15,895.76/x
  3. Step 3: Cross multiply
    28,470.48x = 39,285.60 × 15,895.76
  4. Step 4: Simplify right side
    28,470.48x = 624,474,469.06
  5. Step 5: Solve for x
    x = 624,474,469.06/28,470.48
  6. Step 6: Final answer
    x = 21,934.10

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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.