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Finding the Fourth Proportional to 8,458.99, 12,688.19 and 2,218.95

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Solution

The fourth proportional to 8,458.99, 12,688.19 and 2,218.95 is: 3,328.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.99 : 12,688.19 = 2,218.95 : x
  2. Step 2: Convert to fraction form
    8,458.99/12,688.19 = 2,218.95/x
  3. Step 3: Cross multiply
    8,458.99x = 12,688.19 × 2,218.95
  4. Step 4: Simplify right side
    8,458.99x = 28,154,496.47
  5. Step 5: Solve for x
    x = 28,154,496.47/8,458.99
  6. Step 6: Final answer
    x = 3,328.35

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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.