Home / 15,929.88-21,983.34-9,215.52

Finding the Fourth Proportional to 15,929.88, 21,983.34 and 9,215.52

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Solution

The fourth proportional to 15,929.88, 21,983.34 and 9,215.52 is: 12,717.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.88 : 21,983.34 = 9,215.52 : x
  2. Step 2: Convert to fraction form
    15,929.88/21,983.34 = 9,215.52/x
  3. Step 3: Cross multiply
    15,929.88x = 21,983.34 × 9,215.52
  4. Step 4: Simplify right side
    15,929.88x = 202,587,909.44
  5. Step 5: Solve for x
    x = 202,587,909.44/15,929.88
  6. Step 6: Final answer
    x = 12,717.48

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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.