Home / 13,116.81-18,101.21-7,148.47

Finding the Fourth Proportional to 13,116.81, 18,101.21 and 7,148.47

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Solution

The fourth proportional to 13,116.81, 18,101.21 and 7,148.47 is: 9,864.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.81 : 18,101.21 = 7,148.47 : x
  2. Step 2: Convert to fraction form
    13,116.81/18,101.21 = 7,148.47/x
  3. Step 3: Cross multiply
    13,116.81x = 18,101.21 × 7,148.47
  4. Step 4: Simplify right side
    13,116.81x = 129,396,020.82
  5. Step 5: Solve for x
    x = 129,396,020.82/13,116.81
  6. Step 6: Final answer
    x = 9,864.90

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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.