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Finding the Fourth Proportional to 10,603.79, 15,900.62 and 3,938.16

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Solution

The fourth proportional to 10,603.79, 15,900.62 and 3,938.16 is: 5,905.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,603.79 : 15,900.62 = 3,938.16 : x
  2. Step 2: Convert to fraction form
    10,603.79/15,900.62 = 3,938.16/x
  3. Step 3: Cross multiply
    10,603.79x = 15,900.62 × 3,938.16
  4. Step 4: Simplify right side
    10,603.79x = 62,619,165.97
  5. Step 5: Solve for x
    x = 62,619,165.97/10,603.79
  6. Step 6: Final answer
    x = 5,905.36

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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.