Home / 8,420.07-11,619.78-4,643.37

Finding the Fourth Proportional to 8,420.07, 11,619.78 and 4,643.37

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Solution

The fourth proportional to 8,420.07, 11,619.78 and 4,643.37 is: 6,407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.07 : 11,619.78 = 4,643.37 : x
  2. Step 2: Convert to fraction form
    8,420.07/11,619.78 = 4,643.37/x
  3. Step 3: Cross multiply
    8,420.07x = 11,619.78 × 4,643.37
  4. Step 4: Simplify right side
    8,420.07x = 53,954,937.86
  5. Step 5: Solve for x
    x = 53,954,937.86/8,420.07
  6. Step 6: Final answer
    x = 6,407.90

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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.