Home / 10,772.80-16,159.20-8,148.40

Finding the Fourth Proportional to 10,772.80, 16,159.20 and 8,148.40

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Solution

The fourth proportional to 10,772.80, 16,159.20 and 8,148.40 is: 12,222.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,772.80 : 16,159.20 = 8,148.40 : x
  2. Step 2: Convert to fraction form
    10,772.80/16,159.20 = 8,148.40/x
  3. Step 3: Cross multiply
    10,772.80x = 16,159.20 × 8,148.40
  4. Step 4: Simplify right side
    10,772.80x = 131,671,625.28
  5. Step 5: Solve for x
    x = 131,671,625.28/10,772.80
  6. Step 6: Final answer
    x = 12,222.60

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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.