Home / 13,209.12-18,226.76-7,903.22

Finding the Fourth Proportional to 13,209.12, 18,226.76 and 7,903.22

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Solution

The fourth proportional to 13,209.12, 18,226.76 and 7,903.22 is: 10,905.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.12 : 18,226.76 = 7,903.22 : x
  2. Step 2: Convert to fraction form
    13,209.12/18,226.76 = 7,903.22/x
  3. Step 3: Cross multiply
    13,209.12x = 18,226.76 × 7,903.22
  4. Step 4: Simplify right side
    13,209.12x = 144,049,963.52
  5. Step 5: Solve for x
    x = 144,049,963.52/13,209.12
  6. Step 6: Final answer
    x = 10,905.34

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Half scale
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Double scale
Find fourth proportional to 13,210.12, 18,228.13 and 7,904.22
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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.