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Finding the Fourth Proportional to 12,348.99, 18,507.96 and 8,820.63

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Solution

The fourth proportional to 12,348.99, 18,507.96 and 8,820.63 is: 13,219.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,348.99 : 18,507.96 = 8,820.63 : x
  2. Step 2: Convert to fraction form
    12,348.99/18,507.96 = 8,820.63/x
  3. Step 3: Cross multiply
    12,348.99x = 18,507.96 × 8,820.63
  4. Step 4: Simplify right side
    12,348.99x = 163,251,867.21
  5. Step 5: Solve for x
    x = 163,251,867.21/12,348.99
  6. Step 6: Final answer
    x = 13,219.86

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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.