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Finding the Fourth Proportional to 19,611.80, 29,436.90 and 9,762.20

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Solution

The fourth proportional to 19,611.80, 29,436.90 and 9,762.20 is: 14,652.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,611.80 : 29,436.90 = 9,762.20 : x
  2. Step 2: Convert to fraction form
    19,611.80/29,436.90 = 9,762.20/x
  3. Step 3: Cross multiply
    19,611.80x = 29,436.90 × 9,762.20
  4. Step 4: Simplify right side
    19,611.80x = 287,368,905.18
  5. Step 5: Solve for x
    x = 287,368,905.18/19,611.80
  6. Step 6: Final answer
    x = 14,652.86

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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.