Home / 8,420.51-11,620.39-4,643.81

Finding the Fourth Proportional to 8,420.51, 11,620.39 and 4,643.81

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Solution

The fourth proportional to 8,420.51, 11,620.39 and 4,643.81 is: 6,408.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.51 : 11,620.39 = 4,643.81 : x
  2. Step 2: Convert to fraction form
    8,420.51/11,620.39 = 4,643.81/x
  3. Step 3: Cross multiply
    8,420.51x = 11,620.39 × 4,643.81
  4. Step 4: Simplify right side
    8,420.51x = 53,962,860.07
  5. Step 5: Solve for x
    x = 53,962,860.07/8,420.51
  6. Step 6: Final answer
    x = 6,408.50

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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.