Home / 6,438.86-8,887.01-3,921.80

Finding the Fourth Proportional to 6,438.86, 8,887.01 and 3,921.80

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Solution

The fourth proportional to 6,438.86, 8,887.01 and 3,921.80 is: 5,412.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.86 : 8,887.01 = 3,921.80 : x
  2. Step 2: Convert to fraction form
    6,438.86/8,887.01 = 3,921.80/x
  3. Step 3: Cross multiply
    6,438.86x = 8,887.01 × 3,921.80
  4. Step 4: Simplify right side
    6,438.86x = 34,853,075.82
  5. Step 5: Solve for x
    x = 34,853,075.82/6,438.86
  6. Step 6: Final answer
    x = 5,412.93

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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.