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Finding the Fourth Proportional to 10,200.70, 15,301.05 and 8,742.70

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Solution

The fourth proportional to 10,200.70, 15,301.05 and 8,742.70 is: 13,114.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,200.70 : 15,301.05 = 8,742.70 : x
  2. Step 2: Convert to fraction form
    10,200.70/15,301.05 = 8,742.70/x
  3. Step 3: Cross multiply
    10,200.70x = 15,301.05 × 8,742.70
  4. Step 4: Simplify right side
    10,200.70x = 133,772,489.84
  5. Step 5: Solve for x
    x = 133,772,489.84/10,200.70
  6. Step 6: Final answer
    x = 13,114.05

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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.