Home / 13,090.45-18,064.86-7,122.12

Finding the Fourth Proportional to 13,090.45, 18,064.86 and 7,122.12

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Solution

The fourth proportional to 13,090.45, 18,064.86 and 7,122.12 is: 9,828.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.45 : 18,064.86 = 7,122.12 : x
  2. Step 2: Convert to fraction form
    13,090.45/18,064.86 = 7,122.12/x
  3. Step 3: Cross multiply
    13,090.45x = 18,064.86 × 7,122.12
  4. Step 4: Simplify right side
    13,090.45x = 128,660,100.70
  5. Step 5: Solve for x
    x = 128,660,100.70/13,090.45
  6. Step 6: Final answer
    x = 9,828.55

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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.