Home / 13,090.99-18,065.56-7,122.65

Finding the Fourth Proportional to 13,090.99, 18,065.56 and 7,122.65

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Solution

The fourth proportional to 13,090.99, 18,065.56 and 7,122.65 is: 9,829.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.99 : 18,065.56 = 7,122.65 : x
  2. Step 2: Convert to fraction form
    13,090.99/18,065.56 = 7,122.65/x
  3. Step 3: Cross multiply
    13,090.99x = 18,065.56 × 7,122.65
  4. Step 4: Simplify right side
    13,090.99x = 128,674,625.32
  5. Step 5: Solve for x
    x = 128,674,625.32/13,090.99
  6. Step 6: Final answer
    x = 9,829.25

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Double scale
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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.