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Finding the Fourth Proportional to 20,658.40, 30,977.35 and 8,810.32

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Solution

The fourth proportional to 20,658.40, 30,977.35 and 8,810.32 is: 13,211.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.40 : 30,977.35 = 8,810.32 : x
  2. Step 2: Convert to fraction form
    20,658.40/30,977.35 = 8,810.32/x
  3. Step 3: Cross multiply
    20,658.40x = 30,977.35 × 8,810.32
  4. Step 4: Simplify right side
    20,658.40x = 272,920,366.25
  5. Step 5: Solve for x
    x = 272,920,366.25/20,658.40
  6. Step 6: Final answer
    x = 13,211.11

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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.