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Finding the Fourth Proportional to 20,353.40, 30,530.10 and 7,207.10

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Solution

The fourth proportional to 20,353.40, 30,530.10 and 7,207.10 is: 10,810.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,353.40 : 30,530.10 = 7,207.10 : x
  2. Step 2: Convert to fraction form
    20,353.40/30,530.10 = 7,207.10/x
  3. Step 3: Cross multiply
    20,353.40x = 30,530.10 × 7,207.10
  4. Step 4: Simplify right side
    20,353.40x = 220,033,483.71
  5. Step 5: Solve for x
    x = 220,033,483.71/20,353.40
  6. Step 6: Final answer
    x = 10,810.65

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.