Home / 13,435.80-18,542.91-8,130.51

Finding the Fourth Proportional to 13,435.80, 18,542.91 and 8,130.51

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Solution

The fourth proportional to 13,435.80, 18,542.91 and 8,130.51 is: 11,221.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,435.80 : 18,542.91 = 8,130.51 : x
  2. Step 2: Convert to fraction form
    13,435.80/18,542.91 = 8,130.51/x
  3. Step 3: Cross multiply
    13,435.80x = 18,542.91 × 8,130.51
  4. Step 4: Simplify right side
    13,435.80x = 150,763,315.18
  5. Step 5: Solve for x
    x = 150,763,315.18/13,435.80
  6. Step 6: Final answer
    x = 11,221.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.