Home / 13,437.72-20,160.63-5,428.37

Finding the Fourth Proportional to 13,437.72, 20,160.63 and 5,428.37

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Solution

The fourth proportional to 13,437.72, 20,160.63 and 5,428.37 is: 8,144.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,437.72 : 20,160.63 = 5,428.37 : x
  2. Step 2: Convert to fraction form
    13,437.72/20,160.63 = 5,428.37/x
  3. Step 3: Cross multiply
    13,437.72x = 20,160.63 × 5,428.37
  4. Step 4: Simplify right side
    13,437.72x = 109,439,409.47
  5. Step 5: Solve for x
    x = 109,439,409.47/13,437.72
  6. Step 6: Final answer
    x = 8,144.19

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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.