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Finding the Fourth Proportional to 12,454.60, 18,689.10 and 4,664.20

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Solution

The fourth proportional to 12,454.60, 18,689.10 and 4,664.20 is: 6,999.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,454.60 : 18,689.10 = 4,664.20 : x
  2. Step 2: Convert to fraction form
    12,454.60/18,689.10 = 4,664.20/x
  3. Step 3: Cross multiply
    12,454.60x = 18,689.10 × 4,664.20
  4. Step 4: Simplify right side
    12,454.60x = 87,169,700.22
  5. Step 5: Solve for x
    x = 87,169,700.22/12,454.60
  6. Step 6: Final answer
    x = 6,999.00

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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.