Home / 13,130.36-18,119.50-7,162.12

Finding the Fourth Proportional to 13,130.36, 18,119.50 and 7,162.12

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Solution

The fourth proportional to 13,130.36, 18,119.50 and 7,162.12 is: 9,883.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.36 : 18,119.50 = 7,162.12 : x
  2. Step 2: Convert to fraction form
    13,130.36/18,119.50 = 7,162.12/x
  3. Step 3: Cross multiply
    13,130.36x = 18,119.50 × 7,162.12
  4. Step 4: Simplify right side
    13,130.36x = 129,774,033.34
  5. Step 5: Solve for x
    x = 129,774,033.34/13,130.36
  6. Step 6: Final answer
    x = 9,883.51

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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.