Home / 9,387.36-12,954.40-5,138.32

Finding the Fourth Proportional to 9,387.36, 12,954.40 and 5,138.32

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Solution

The fourth proportional to 9,387.36, 12,954.40 and 5,138.32 is: 7,090.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,387.36 : 12,954.40 = 5,138.32 : x
  2. Step 2: Convert to fraction form
    9,387.36/12,954.40 = 5,138.32/x
  3. Step 3: Cross multiply
    9,387.36x = 12,954.40 × 5,138.32
  4. Step 4: Simplify right side
    9,387.36x = 66,563,852.61
  5. Step 5: Solve for x
    x = 66,563,852.61/9,387.36
  6. Step 6: Final answer
    x = 7,090.80

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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.