Home / 6,389.91-8,817.71-3,557.07

Finding the Fourth Proportional to 6,389.91, 8,817.71 and 3,557.07

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Solution

The fourth proportional to 6,389.91, 8,817.71 and 3,557.07 is: 4,908.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,389.91 : 8,817.71 = 3,557.07 : x
  2. Step 2: Convert to fraction form
    6,389.91/8,817.71 = 3,557.07/x
  3. Step 3: Cross multiply
    6,389.91x = 8,817.71 × 3,557.07
  4. Step 4: Simplify right side
    6,389.91x = 31,365,193.92
  5. Step 5: Solve for x
    x = 31,365,193.92/6,389.91
  6. Step 6: Final answer
    x = 4,908.55

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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.