Home / 6,405.55-8,838.32-3,888.99

Finding the Fourth Proportional to 6,405.55, 8,838.32 and 3,888.99

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Solution

The fourth proportional to 6,405.55, 8,838.32 and 3,888.99 is: 5,365.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,405.55 : 8,838.32 = 3,888.99 : x
  2. Step 2: Convert to fraction form
    6,405.55/8,838.32 = 3,888.99/x
  3. Step 3: Cross multiply
    6,405.55x = 8,838.32 × 3,888.99
  4. Step 4: Simplify right side
    6,405.55x = 34,372,074.46
  5. Step 5: Solve for x
    x = 34,372,074.46/6,405.55
  6. Step 6: Final answer
    x = 5,365.98

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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.