Home / 9,116.51-12,579.88-5,138.33

Finding the Fourth Proportional to 9,116.51, 12,579.88 and 5,138.33

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Solution

The fourth proportional to 9,116.51, 12,579.88 and 5,138.33 is: 7,090.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,116.51 : 12,579.88 = 5,138.33 : x
  2. Step 2: Convert to fraction form
    9,116.51/12,579.88 = 5,138.33/x
  3. Step 3: Cross multiply
    9,116.51x = 12,579.88 × 5,138.33
  4. Step 4: Simplify right side
    9,116.51x = 64,639,574.80
  5. Step 5: Solve for x
    x = 64,639,574.80/9,116.51
  6. Step 6: Final answer
    x = 7,090.39

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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.