Home / 13,555.09-20,331.43-4,789.57

Finding the Fourth Proportional to 13,555.09, 20,331.43 and 4,789.57

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Solution

The fourth proportional to 13,555.09, 20,331.43 and 4,789.57 is: 7,183.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.09 : 20,331.43 = 4,789.57 : x
  2. Step 2: Convert to fraction form
    13,555.09/20,331.43 = 4,789.57/x
  3. Step 3: Cross multiply
    13,555.09x = 20,331.43 × 4,789.57
  4. Step 4: Simplify right side
    13,555.09x = 97,378,807.19
  5. Step 5: Solve for x
    x = 97,378,807.19/13,555.09
  6. Step 6: Final answer
    x = 7,183.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.