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Finding the Fourth Proportional to 8,900.40, 13,339.24 and 4,220.40

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Solution

The fourth proportional to 8,900.40, 13,339.24 and 4,220.40 is: 6,325.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,900.40 : 13,339.24 = 4,220.40 : x
  2. Step 2: Convert to fraction form
    8,900.40/13,339.24 = 4,220.40/x
  3. Step 3: Cross multiply
    8,900.40x = 13,339.24 × 4,220.40
  4. Step 4: Simplify right side
    8,900.40x = 56,296,928.50
  5. Step 5: Solve for x
    x = 56,296,928.50/8,900.40
  6. Step 6: Final answer
    x = 6,325.21

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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.