Home / 13,130.68-18,119.76-7,162.24

Finding the Fourth Proportional to 13,130.68, 18,119.76 and 7,162.24

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Solution

The fourth proportional to 13,130.68, 18,119.76 and 7,162.24 is: 9,883.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.68 : 18,119.76 = 7,162.24 : x
  2. Step 2: Convert to fraction form
    13,130.68/18,119.76 = 7,162.24/x
  3. Step 3: Cross multiply
    13,130.68x = 18,119.76 × 7,162.24
  4. Step 4: Simplify right side
    13,130.68x = 129,778,069.86
  5. Step 5: Solve for x
    x = 129,778,069.86/13,130.68
  6. Step 6: Final answer
    x = 9,883.58

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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.