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Finding the Fourth Proportional to 8,618.58, 12,929.39 and 4,457.46

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Solution

The fourth proportional to 8,618.58, 12,929.39 and 4,457.46 is: 6,686.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.58 : 12,929.39 = 4,457.46 : x
  2. Step 2: Convert to fraction form
    8,618.58/12,929.39 = 4,457.46/x
  3. Step 3: Cross multiply
    8,618.58x = 12,929.39 × 4,457.46
  4. Step 4: Simplify right side
    8,618.58x = 57,632,238.75
  5. Step 5: Solve for x
    x = 57,632,238.75/8,618.58
  6. Step 6: Final answer
    x = 6,686.98

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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.