Home / 9,388.49-12,955.55-5,138.70

Finding the Fourth Proportional to 9,388.49, 12,955.55 and 5,138.70

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Solution

The fourth proportional to 9,388.49, 12,955.55 and 5,138.70 is: 7,091.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,388.49 : 12,955.55 = 5,138.70 : x
  2. Step 2: Convert to fraction form
    9,388.49/12,955.55 = 5,138.70/x
  3. Step 3: Cross multiply
    9,388.49x = 12,955.55 × 5,138.70
  4. Step 4: Simplify right side
    9,388.49x = 66,574,659.09
  5. Step 5: Solve for x
    x = 66,574,659.09/9,388.49
  6. Step 6: Final answer
    x = 7,091.10

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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.