Home / 15,969.91-21,878.88-15,371.34

Finding the Fourth Proportional to 15,969.91, 21,878.88 and 15,371.34

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Solution

The fourth proportional to 15,969.91, 21,878.88 and 15,371.34 is: 21,058.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,969.91 : 21,878.88 = 15,371.34 : x
  2. Step 2: Convert to fraction form
    15,969.91/21,878.88 = 15,371.34/x
  3. Step 3: Cross multiply
    15,969.91x = 21,878.88 × 15,371.34
  4. Step 4: Simplify right side
    15,969.91x = 336,307,703.30
  5. Step 5: Solve for x
    x = 336,307,703.30/15,969.91
  6. Step 6: Final answer
    x = 21,058.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.