Home / 13,138.02-18,130.64-7,169.85

Finding the Fourth Proportional to 13,138.02, 18,130.64 and 7,169.85

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Solution

The fourth proportional to 13,138.02, 18,130.64 and 7,169.85 is: 9,894.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.02 : 18,130.64 = 7,169.85 : x
  2. Step 2: Convert to fraction form
    13,138.02/18,130.64 = 7,169.85/x
  3. Step 3: Cross multiply
    13,138.02x = 18,130.64 × 7,169.85
  4. Step 4: Simplify right side
    13,138.02x = 129,993,933.35
  5. Step 5: Solve for x
    x = 129,993,933.35/13,138.02
  6. Step 6: Final answer
    x = 9,894.48

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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.