Home / 8,420.09-11,619.80-4,643.39

Finding the Fourth Proportional to 8,420.09, 11,619.80 and 4,643.39

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Solution

The fourth proportional to 8,420.09, 11,619.80 and 4,643.39 is: 6,407.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.09 : 11,619.80 = 4,643.39 : x
  2. Step 2: Convert to fraction form
    8,420.09/11,619.80 = 4,643.39/x
  3. Step 3: Cross multiply
    8,420.09x = 11,619.80 × 4,643.39
  4. Step 4: Simplify right side
    8,420.09x = 53,955,181.81
  5. Step 5: Solve for x
    x = 53,955,181.81/8,420.09
  6. Step 6: Final answer
    x = 6,407.91

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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.