Home / 8,420.79-11,621.67-5,065.29

Finding the Fourth Proportional to 8,420.79, 11,621.67 and 5,065.29

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Solution

The fourth proportional to 8,420.79, 11,621.67 and 5,065.29 is: 6,990.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.79 : 11,621.67 = 5,065.29 : x
  2. Step 2: Convert to fraction form
    8,420.79/11,621.67 = 5,065.29/x
  3. Step 3: Cross multiply
    8,420.79x = 11,621.67 × 5,065.29
  4. Step 4: Simplify right side
    8,420.79x = 58,867,128.83
  5. Step 5: Solve for x
    x = 58,867,128.83/8,420.79
  6. Step 6: Final answer
    x = 6,990.69

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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.