Home / 15,509.57-21,418.36-13,258.37

Finding the Fourth Proportional to 15,509.57, 21,418.36 and 13,258.37

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Solution

The fourth proportional to 15,509.57, 21,418.36 and 13,258.37 is: 18,309.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.57 : 21,418.36 = 13,258.37 : x
  2. Step 2: Convert to fraction form
    15,509.57/21,418.36 = 13,258.37/x
  3. Step 3: Cross multiply
    15,509.57x = 21,418.36 × 13,258.37
  4. Step 4: Simplify right side
    15,509.57x = 283,972,562.07
  5. Step 5: Solve for x
    x = 283,972,562.07/15,509.57
  6. Step 6: Final answer
    x = 18,309.51

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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.