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Finding the Fourth Proportional to 8,898.90, 13,336.99 and 4,218.90

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Solution

The fourth proportional to 8,898.90, 13,336.99 and 4,218.90 is: 6,322.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,898.90 : 13,336.99 = 4,218.90 : x
  2. Step 2: Convert to fraction form
    8,898.90/13,336.99 = 4,218.90/x
  3. Step 3: Cross multiply
    8,898.90x = 13,336.99 × 4,218.90
  4. Step 4: Simplify right side
    8,898.90x = 56,267,427.11
  5. Step 5: Solve for x
    x = 56,267,427.11/8,898.90
  6. Step 6: Final answer
    x = 6,322.96

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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.