Home / 9,780.40-14,638.20-9,002.80

Finding the Fourth Proportional to 9,780.40, 14,638.20 and 9,002.80

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Solution

The fourth proportional to 9,780.40, 14,638.20 and 9,002.80 is: 13,474.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,780.40 : 14,638.20 = 9,002.80 : x
  2. Step 2: Convert to fraction form
    9,780.40/14,638.20 = 9,002.80/x
  3. Step 3: Cross multiply
    9,780.40x = 14,638.20 × 9,002.80
  4. Step 4: Simplify right side
    9,780.40x = 131,784,786.96
  5. Step 5: Solve for x
    x = 131,784,786.96/9,780.40
  6. Step 6: Final answer
    x = 13,474.38

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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.