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Finding the Fourth Proportional to 12,492.80, 18,700.80 and 9,036.80

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Solution

The fourth proportional to 12,492.80, 18,700.80 and 9,036.80 is: 13,527.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,492.80 : 18,700.80 = 9,036.80 : x
  2. Step 2: Convert to fraction form
    12,492.80/18,700.80 = 9,036.80/x
  3. Step 3: Cross multiply
    12,492.80x = 18,700.80 × 9,036.80
  4. Step 4: Simplify right side
    12,492.80x = 168,995,389.44
  5. Step 5: Solve for x
    x = 168,995,389.44/12,492.80
  6. Step 6: Final answer
    x = 13,527.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.