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Finding the Fourth Proportional to 15,206.93, 20,985.55 and 8,492.55

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Solution

The fourth proportional to 15,206.93, 20,985.55 and 8,492.55 is: 11,719.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,206.93 : 20,985.55 = 8,492.55 : x
  2. Step 2: Convert to fraction form
    15,206.93/20,985.55 = 8,492.55/x
  3. Step 3: Cross multiply
    15,206.93x = 20,985.55 × 8,492.55
  4. Step 4: Simplify right side
    15,206.93x = 178,220,832.65
  5. Step 5: Solve for x
    x = 178,220,832.65/15,206.93
  6. Step 6: Final answer
    x = 11,719.71

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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.