Home / 13,405.91-18,485.01-9,159.48

Finding the Fourth Proportional to 13,405.91, 18,485.01 and 9,159.48

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Solution

The fourth proportional to 13,405.91, 18,485.01 and 9,159.48 is: 12,629.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.91 : 18,485.01 = 9,159.48 : x
  2. Step 2: Convert to fraction form
    13,405.91/18,485.01 = 9,159.48/x
  3. Step 3: Cross multiply
    13,405.91x = 18,485.01 × 9,159.48
  4. Step 4: Simplify right side
    13,405.91x = 169,313,079.39
  5. Step 5: Solve for x
    x = 169,313,079.39/13,405.91
  6. Step 6: Final answer
    x = 12,629.74

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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.