Home / 8,739.12-13,095.71-6,419.28

Finding the Fourth Proportional to 8,739.12, 13,095.71 and 6,419.28

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Solution

The fourth proportional to 8,739.12, 13,095.71 and 6,419.28 is: 9,619.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.12 : 13,095.71 = 6,419.28 : x
  2. Step 2: Convert to fraction form
    8,739.12/13,095.71 = 6,419.28/x
  3. Step 3: Cross multiply
    8,739.12x = 13,095.71 × 6,419.28
  4. Step 4: Simplify right side
    8,739.12x = 84,064,963.81
  5. Step 5: Solve for x
    x = 84,064,963.81/8,739.12
  6. Step 6: Final answer
    x = 9,619.39

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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.