Home / 15,929.55-21,981.24-9,213.84

Finding the Fourth Proportional to 15,929.55, 21,981.24 and 9,213.84

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Solution

The fourth proportional to 15,929.55, 21,981.24 and 9,213.84 is: 12,714.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.55 : 21,981.24 = 9,213.84 : x
  2. Step 2: Convert to fraction form
    15,929.55/21,981.24 = 9,213.84/x
  3. Step 3: Cross multiply
    15,929.55x = 21,981.24 × 9,213.84
  4. Step 4: Simplify right side
    15,929.55x = 202,531,628.36
  5. Step 5: Solve for x
    x = 202,531,628.36/15,929.55
  6. Step 6: Final answer
    x = 12,714.21

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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.