Home / 13,629.87-18,803.48-9,155.07

Finding the Fourth Proportional to 13,629.87, 18,803.48 and 9,155.07

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Solution

The fourth proportional to 13,629.87, 18,803.48 and 9,155.07 is: 12,630.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.87 : 18,803.48 = 9,155.07 : x
  2. Step 2: Convert to fraction form
    13,629.87/18,803.48 = 9,155.07/x
  3. Step 3: Cross multiply
    13,629.87x = 18,803.48 × 9,155.07
  4. Step 4: Simplify right side
    13,629.87x = 172,147,129.87
  5. Step 5: Solve for x
    x = 172,147,129.87/13,629.87
  6. Step 6: Final answer
    x = 12,630.14

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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.