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Finding the Fourth Proportional to 10,365.68, 15,548.16 and 3,440

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Solution

The fourth proportional to 10,365.68, 15,548.16 and 3,440 is: 5,159.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,365.68 : 15,548.16 = 3,440 : x
  2. Step 2: Convert to fraction form
    10,365.68/15,548.16 = 3,440/x
  3. Step 3: Cross multiply
    10,365.68x = 15,548.16 × 3,440
  4. Step 4: Simplify right side
    10,365.68x = 53,485,670.40
  5. Step 5: Solve for x
    x = 53,485,670.40/10,365.68
  6. Step 6: Final answer
    x = 5,159.88

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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.