Home / 18,285.30-25,237.98-12,981.78

Finding the Fourth Proportional to 18,285.30, 25,237.98 and 12,981.78

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Solution

The fourth proportional to 18,285.30, 25,237.98 and 12,981.78 is: 17,917.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.30 : 25,237.98 = 12,981.78 : x
  2. Step 2: Convert to fraction form
    18,285.30/25,237.98 = 12,981.78/x
  3. Step 3: Cross multiply
    18,285.30x = 25,237.98 × 12,981.78
  4. Step 4: Simplify right side
    18,285.30x = 327,633,904.00
  5. Step 5: Solve for x
    x = 327,633,904.00/18,285.30
  6. Step 6: Final answer
    x = 17,917.89

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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.