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Finding the Fourth Proportional to 10,530.40, 15,796.08 and 5,346.40

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Solution

The fourth proportional to 10,530.40, 15,796.08 and 5,346.40 is: 8,019.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,530.40 : 15,796.08 = 5,346.40 : x
  2. Step 2: Convert to fraction form
    10,530.40/15,796.08 = 5,346.40/x
  3. Step 3: Cross multiply
    10,530.40x = 15,796.08 × 5,346.40
  4. Step 4: Simplify right side
    10,530.40x = 84,452,162.11
  5. Step 5: Solve for x
    x = 84,452,162.11/10,530.40
  6. Step 6: Final answer
    x = 8,019.84

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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.