Home / 8,309.79-12,445.52-5,379.21

Finding the Fourth Proportional to 8,309.79, 12,445.52 and 5,379.21

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Solution

The fourth proportional to 8,309.79, 12,445.52 and 5,379.21 is: 8,056.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,309.79 : 12,445.52 = 5,379.21 : x
  2. Step 2: Convert to fraction form
    8,309.79/12,445.52 = 5,379.21/x
  3. Step 3: Cross multiply
    8,309.79x = 12,445.52 × 5,379.21
  4. Step 4: Simplify right side
    8,309.79x = 66,947,038.74
  5. Step 5: Solve for x
    x = 66,947,038.74/8,309.79
  6. Step 6: Final answer
    x = 8,056.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.