Home / 8,106.40-12,127.20-7,328.80

Finding the Fourth Proportional to 8,106.40, 12,127.20 and 7,328.80

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Solution

The fourth proportional to 8,106.40, 12,127.20 and 7,328.80 is: 10,963.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,106.40 : 12,127.20 = 7,328.80 : x
  2. Step 2: Convert to fraction form
    8,106.40/12,127.20 = 7,328.80/x
  3. Step 3: Cross multiply
    8,106.40x = 12,127.20 × 7,328.80
  4. Step 4: Simplify right side
    8,106.40x = 88,877,823.36
  5. Step 5: Solve for x
    x = 88,877,823.36/8,106.40
  6. Step 6: Final answer
    x = 10,963.91

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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.