Home / 7,728.34-10,665.12-4,191.55

Finding the Fourth Proportional to 7,728.34, 10,665.12 and 4,191.55

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Solution

The fourth proportional to 7,728.34, 10,665.12 and 4,191.55 is: 5,784.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,728.34 : 10,665.12 = 4,191.55 : x
  2. Step 2: Convert to fraction form
    7,728.34/10,665.12 = 4,191.55/x
  3. Step 3: Cross multiply
    7,728.34x = 10,665.12 × 4,191.55
  4. Step 4: Simplify right side
    7,728.34x = 44,703,383.74
  5. Step 5: Solve for x
    x = 44,703,383.74/7,728.34
  6. Step 6: Final answer
    x = 5,784.34

Related Problems

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Half scale
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Double scale
Find fourth proportional to 7,729.34, 10,666.50 and 4,192.55
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.