Home / 15,929.22-21,981.12-8,855.04

Finding the Fourth Proportional to 15,929.22, 21,981.12 and 8,855.04

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Solution

The fourth proportional to 15,929.22, 21,981.12 and 8,855.04 is: 12,219.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.22 : 21,981.12 = 8,855.04 : x
  2. Step 2: Convert to fraction form
    15,929.22/21,981.12 = 8,855.04/x
  3. Step 3: Cross multiply
    15,929.22x = 21,981.12 × 8,855.04
  4. Step 4: Simplify right side
    15,929.22x = 194,643,696.84
  5. Step 5: Solve for x
    x = 194,643,696.84/15,929.22
  6. Step 6: Final answer
    x = 12,219.29

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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.