Home / 13,813.77-20,720.79-7,570.38

Finding the Fourth Proportional to 13,813.77, 20,720.79 and 7,570.38

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Solution

The fourth proportional to 13,813.77, 20,720.79 and 7,570.38 is: 11,355.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,813.77 : 20,720.79 = 7,570.38 : x
  2. Step 2: Convert to fraction form
    13,813.77/20,720.79 = 7,570.38/x
  3. Step 3: Cross multiply
    13,813.77x = 20,720.79 × 7,570.38
  4. Step 4: Simplify right side
    13,813.77x = 156,864,150.60
  5. Step 5: Solve for x
    x = 156,864,150.60/13,813.77
  6. Step 6: Final answer
    x = 11,355.64

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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.