Home / 30,664.80-45,997.20-9,890.40

Finding the Fourth Proportional to 30,664.80, 45,997.20 and 9,890.40

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Solution

The fourth proportional to 30,664.80, 45,997.20 and 9,890.40 is: 14,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,664.80 : 45,997.20 = 9,890.40 : x
  2. Step 2: Convert to fraction form
    30,664.80/45,997.20 = 9,890.40/x
  3. Step 3: Cross multiply
    30,664.80x = 45,997.20 × 9,890.40
  4. Step 4: Simplify right side
    30,664.80x = 454,930,706.88
  5. Step 5: Solve for x
    x = 454,930,706.88/30,664.80
  6. Step 6: Final answer
    x = 14,835.60

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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.