Home / 13,090.21-18,064.86-7,122.26

Finding the Fourth Proportional to 13,090.21, 18,064.86 and 7,122.26

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Solution

The fourth proportional to 13,090.21, 18,064.86 and 7,122.26 is: 9,828.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.21 : 18,064.86 = 7,122.26 : x
  2. Step 2: Convert to fraction form
    13,090.21/18,064.86 = 7,122.26/x
  3. Step 3: Cross multiply
    13,090.21x = 18,064.86 × 7,122.26
  4. Step 4: Simplify right side
    13,090.21x = 128,662,648.24
  5. Step 5: Solve for x
    x = 128,662,648.24/13,090.21
  6. Step 6: Final answer
    x = 9,828.92

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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.