Home / 15,490.80-21,371.36-11,467.20

Finding the Fourth Proportional to 15,490.80, 21,371.36 and 11,467.20

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Solution

The fourth proportional to 15,490.80, 21,371.36 and 11,467.20 is: 15,820.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.80 : 21,371.36 = 11,467.20 : x
  2. Step 2: Convert to fraction form
    15,490.80/21,371.36 = 11,467.20/x
  3. Step 3: Cross multiply
    15,490.80x = 21,371.36 × 11,467.20
  4. Step 4: Simplify right side
    15,490.80x = 245,069,659.39
  5. Step 5: Solve for x
    x = 245,069,659.39/15,490.80
  6. Step 6: Final answer
    x = 15,820.34

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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.