Home / 13,116.88-18,100.65-7,148.53

Finding the Fourth Proportional to 13,116.88, 18,100.65 and 7,148.53

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Solution

The fourth proportional to 13,116.88, 18,100.65 and 7,148.53 is: 9,864.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.88 : 18,100.65 = 7,148.53 : x
  2. Step 2: Convert to fraction form
    13,116.88/18,100.65 = 7,148.53/x
  3. Step 3: Cross multiply
    13,116.88x = 18,100.65 × 7,148.53
  4. Step 4: Simplify right side
    13,116.88x = 129,393,039.54
  5. Step 5: Solve for x
    x = 129,393,039.54/13,116.88
  6. Step 6: Final answer
    x = 9,864.62

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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.