Home / 9,139.20-12,612.21-5,362.44

Finding the Fourth Proportional to 9,139.20, 12,612.21 and 5,362.44

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Solution

The fourth proportional to 9,139.20, 12,612.21 and 5,362.44 is: 7,400.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.20 : 12,612.21 = 5,362.44 : x
  2. Step 2: Convert to fraction form
    9,139.20/12,612.21 = 5,362.44/x
  3. Step 3: Cross multiply
    9,139.20x = 12,612.21 × 5,362.44
  4. Step 4: Simplify right side
    9,139.20x = 67,632,219.39
  5. Step 5: Solve for x
    x = 67,632,219.39/9,139.20
  6. Step 6: Final answer
    x = 7,400.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.