Home / 8,945.52-12,329.34-6,420.72

Finding the Fourth Proportional to 8,945.52, 12,329.34 and 6,420.72

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Solution

The fourth proportional to 8,945.52, 12,329.34 and 6,420.72 is: 8,849.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,945.52 : 12,329.34 = 6,420.72 : x
  2. Step 2: Convert to fraction form
    8,945.52/12,329.34 = 6,420.72/x
  3. Step 3: Cross multiply
    8,945.52x = 12,329.34 × 6,420.72
  4. Step 4: Simplify right side
    8,945.52x = 79,163,239.92
  5. Step 5: Solve for x
    x = 79,163,239.92/8,945.52
  6. Step 6: Final answer
    x = 8,849.48

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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.