Home / 13,111.93-18,094.40-7,143.58

Finding the Fourth Proportional to 13,111.93, 18,094.40 and 7,143.58

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Solution

The fourth proportional to 13,111.93, 18,094.40 and 7,143.58 is: 9,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.93 : 18,094.40 = 7,143.58 : x
  2. Step 2: Convert to fraction form
    13,111.93/18,094.40 = 7,143.58/x
  3. Step 3: Cross multiply
    13,111.93x = 18,094.40 × 7,143.58
  4. Step 4: Simplify right side
    13,111.93x = 129,258,703.48
  5. Step 5: Solve for x
    x = 129,258,703.48/13,111.93
  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.