Home / 7,138.20-10,707.30-6,603.60

Finding the Fourth Proportional to 7,138.20, 10,707.30 and 6,603.60

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Solution

The fourth proportional to 7,138.20, 10,707.30 and 6,603.60 is: 9,905.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.20 : 10,707.30 = 6,603.60 : x
  2. Step 2: Convert to fraction form
    7,138.20/10,707.30 = 6,603.60/x
  3. Step 3: Cross multiply
    7,138.20x = 10,707.30 × 6,603.60
  4. Step 4: Simplify right side
    7,138.20x = 70,706,726.28
  5. Step 5: Solve for x
    x = 70,706,726.28/7,138.20
  6. Step 6: Final answer
    x = 9,905.40

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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.