Home / 13,090.49-18,064.87-7,122.15

Finding the Fourth Proportional to 13,090.49, 18,064.87 and 7,122.15

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Solution

The fourth proportional to 13,090.49, 18,064.87 and 7,122.15 is: 9,828.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.49 : 18,064.87 = 7,122.15 : x
  2. Step 2: Convert to fraction form
    13,090.49/18,064.87 = 7,122.15/x
  3. Step 3: Cross multiply
    13,090.49x = 18,064.87 × 7,122.15
  4. Step 4: Simplify right side
    13,090.49x = 128,660,696.07
  5. Step 5: Solve for x
    x = 128,660,696.07/13,090.49
  6. Step 6: Final answer
    x = 9,828.56

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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.