Home / 15,859.40-21,886.24-8,689.22

Finding the Fourth Proportional to 15,859.40, 21,886.24 and 8,689.22

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Solution

The fourth proportional to 15,859.40, 21,886.24 and 8,689.22 is: 11,991.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,859.40 : 21,886.24 = 8,689.22 : x
  2. Step 2: Convert to fraction form
    15,859.40/21,886.24 = 8,689.22/x
  3. Step 3: Cross multiply
    15,859.40x = 21,886.24 × 8,689.22
  4. Step 4: Simplify right side
    15,859.40x = 190,174,354.33
  5. Step 5: Solve for x
    x = 190,174,354.33/15,859.40
  6. Step 6: Final answer
    x = 11,991.27

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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.