Home / 13,090.61-18,064.82-7,122.13

Finding the Fourth Proportional to 13,090.61, 18,064.82 and 7,122.13

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Solution

The fourth proportional to 13,090.61, 18,064.82 and 7,122.13 is: 9,828.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.61 : 18,064.82 = 7,122.13 : x
  2. Step 2: Convert to fraction form
    13,090.61/18,064.82 = 7,122.13/x
  3. Step 3: Cross multiply
    13,090.61x = 18,064.82 × 7,122.13
  4. Step 4: Simplify right side
    13,090.61x = 128,659,969.11
  5. Step 5: Solve for x
    x = 128,659,969.11/13,090.61
  6. Step 6: Final answer
    x = 9,828.41

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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.