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Finding the Fourth Proportional to 12,653.86, 18,981.30 and 4,755.55

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Solution

The fourth proportional to 12,653.86, 18,981.30 and 4,755.55 is: 7,133.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.86 : 18,981.30 = 4,755.55 : x
  2. Step 2: Convert to fraction form
    12,653.86/18,981.30 = 4,755.55/x
  3. Step 3: Cross multiply
    12,653.86x = 18,981.30 × 4,755.55
  4. Step 4: Simplify right side
    12,653.86x = 90,266,521.22
  5. Step 5: Solve for x
    x = 90,266,521.22/12,653.86
  6. Step 6: Final answer
    x = 7,133.52

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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.