Home / 13,189.17-18,200.28-7,220.94

Finding the Fourth Proportional to 13,189.17, 18,200.28 and 7,220.94

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Solution

The fourth proportional to 13,189.17, 18,200.28 and 7,220.94 is: 9,964.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.17 : 18,200.28 = 7,220.94 : x
  2. Step 2: Convert to fraction form
    13,189.17/18,200.28 = 7,220.94/x
  3. Step 3: Cross multiply
    13,189.17x = 18,200.28 × 7,220.94
  4. Step 4: Simplify right side
    13,189.17x = 131,423,129.86
  5. Step 5: Solve for x
    x = 131,423,129.86/13,189.17
  6. Step 6: Final answer
    x = 9,964.47

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Double scale
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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.