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Finding the Fourth Proportional to 15,926.92, 21,980.34 and 8,855.08

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Solution

The fourth proportional to 15,926.92, 21,980.34 and 8,855.08 is: 12,220.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,926.92 : 21,980.34 = 8,855.08 : x
  2. Step 2: Convert to fraction form
    15,926.92/21,980.34 = 8,855.08/x
  3. Step 3: Cross multiply
    15,926.92x = 21,980.34 × 8,855.08
  4. Step 4: Simplify right side
    15,926.92x = 194,637,669.13
  5. Step 5: Solve for x
    x = 194,637,669.13/15,926.92
  6. Step 6: Final answer
    x = 12,220.67

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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.