Home / 7,817.20-11,727.80-5,513.20

Finding the Fourth Proportional to 7,817.20, 11,727.80 and 5,513.20

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Solution

The fourth proportional to 7,817.20, 11,727.80 and 5,513.20 is: 8,271.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,817.20 : 11,727.80 = 5,513.20 : x
  2. Step 2: Convert to fraction form
    7,817.20/11,727.80 = 5,513.20/x
  3. Step 3: Cross multiply
    7,817.20x = 11,727.80 × 5,513.20
  4. Step 4: Simplify right side
    7,817.20x = 64,657,706.96
  5. Step 5: Solve for x
    x = 64,657,706.96/7,817.20
  6. Step 6: Final answer
    x = 8,271.21

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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.