Home / 13,111.81-18,094.37-7,143.53

Finding the Fourth Proportional to 13,111.81, 18,094.37 and 7,143.53

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Solution

The fourth proportional to 13,111.81, 18,094.37 and 7,143.53 is: 9,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.81 : 18,094.37 = 7,143.53 : x
  2. Step 2: Convert to fraction form
    13,111.81/18,094.37 = 7,143.53/x
  3. Step 3: Cross multiply
    13,111.81x = 18,094.37 × 7,143.53
  4. Step 4: Simplify right side
    13,111.81x = 129,257,548.74
  5. Step 5: Solve for x
    x = 129,257,548.74/13,111.81
  6. Step 6: Final answer
    x = 9,858.10

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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.