Home / 15,581.47-21,496.26-9,914.71

Finding the Fourth Proportional to 15,581.47, 21,496.26 and 9,914.71

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Solution

The fourth proportional to 15,581.47, 21,496.26 and 9,914.71 is: 13,678.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,581.47 : 21,496.26 = 9,914.71 : x
  2. Step 2: Convert to fraction form
    15,581.47/21,496.26 = 9,914.71/x
  3. Step 3: Cross multiply
    15,581.47x = 21,496.26 × 9,914.71
  4. Step 4: Simplify right side
    15,581.47x = 213,129,183.98
  5. Step 5: Solve for x
    x = 213,129,183.98/15,581.47
  6. Step 6: Final answer
    x = 13,678.37

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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.