Home / 18,688.78-25,789.35-10,305.28

Finding the Fourth Proportional to 18,688.78, 25,789.35 and 10,305.28

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Solution

The fourth proportional to 18,688.78, 25,789.35 and 10,305.28 is: 14,220.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.78 : 25,789.35 = 10,305.28 : x
  2. Step 2: Convert to fraction form
    18,688.78/25,789.35 = 10,305.28/x
  3. Step 3: Cross multiply
    18,688.78x = 25,789.35 × 10,305.28
  4. Step 4: Simplify right side
    18,688.78x = 265,766,472.77
  5. Step 5: Solve for x
    x = 265,766,472.77/18,688.78
  6. Step 6: Final answer
    x = 14,220.64

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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.