Home / 15,126.83-20,856.13-12,855.99

Finding the Fourth Proportional to 15,126.83, 20,856.13 and 12,855.99

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Solution

The fourth proportional to 15,126.83, 20,856.13 and 12,855.99 is: 17,725.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.83 : 20,856.13 = 12,855.99 : x
  2. Step 2: Convert to fraction form
    15,126.83/20,856.13 = 12,855.99/x
  3. Step 3: Cross multiply
    15,126.83x = 20,856.13 × 12,855.99
  4. Step 4: Simplify right side
    15,126.83x = 268,126,166.58
  5. Step 5: Solve for x
    x = 268,126,166.58/15,126.83
  6. Step 6: Final answer
    x = 17,725.21

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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.