Home / 13,438.08-20,155.44-7,210.56

Finding the Fourth Proportional to 13,438.08, 20,155.44 and 7,210.56

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Solution

The fourth proportional to 13,438.08, 20,155.44 and 7,210.56 is: 10,814.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.08 : 20,155.44 = 7,210.56 : x
  2. Step 2: Convert to fraction form
    13,438.08/20,155.44 = 7,210.56/x
  3. Step 3: Cross multiply
    13,438.08x = 20,155.44 × 7,210.56
  4. Step 4: Simplify right side
    13,438.08x = 145,332,009.45
  5. Step 5: Solve for x
    x = 145,332,009.45/13,438.08
  6. Step 6: Final answer
    x = 10,814.94

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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.