Home / 13,437.80-20,162.51-5,120.31

Finding the Fourth Proportional to 13,437.80, 20,162.51 and 5,120.31

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Solution

The fourth proportional to 13,437.80, 20,162.51 and 5,120.31 is: 7,682.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,437.80 : 20,162.51 = 5,120.31 : x
  2. Step 2: Convert to fraction form
    13,437.80/20,162.51 = 5,120.31/x
  3. Step 3: Cross multiply
    13,437.80x = 20,162.51 × 5,120.31
  4. Step 4: Simplify right side
    13,437.80x = 103,238,275.98
  5. Step 5: Solve for x
    x = 103,238,275.98/13,437.80
  6. Step 6: Final answer
    x = 7,682.68

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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.