Home / 18,789.12-25,930.56-10,406.40

Finding the Fourth Proportional to 18,789.12, 25,930.56 and 10,406.40

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Solution

The fourth proportional to 18,789.12, 25,930.56 and 10,406.40 is: 14,361.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.12 : 25,930.56 = 10,406.40 : x
  2. Step 2: Convert to fraction form
    18,789.12/25,930.56 = 10,406.40/x
  3. Step 3: Cross multiply
    18,789.12x = 25,930.56 × 10,406.40
  4. Step 4: Simplify right side
    18,789.12x = 269,843,779.58
  5. Step 5: Solve for x
    x = 269,843,779.58/18,789.12
  6. Step 6: Final answer
    x = 14,361.70

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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.