Home / 3,888.35-5,330.90-3,818.40

Finding the Fourth Proportional to 3,888.35, 5,330.90 and 3,818.40

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Solution

The fourth proportional to 3,888.35, 5,330.90 and 3,818.40 is: 5,235.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.35 : 5,330.90 = 3,818.40 : x
  2. Step 2: Convert to fraction form
    3,888.35/5,330.90 = 3,818.40/x
  3. Step 3: Cross multiply
    3,888.35x = 5,330.90 × 3,818.40
  4. Step 4: Simplify right side
    3,888.35x = 20,355,489.47
  5. Step 5: Solve for x
    x = 20,355,489.47/3,888.35
  6. Step 6: Final answer
    x = 5,235.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.