Home / 21,009.75-28,993.47-12,626.25

Finding the Fourth Proportional to 21,009.75, 28,993.47 and 12,626.25

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Solution

The fourth proportional to 21,009.75, 28,993.47 and 12,626.25 is: 17,424.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.75 : 28,993.47 = 12,626.25 : x
  2. Step 2: Convert to fraction form
    21,009.75/28,993.47 = 12,626.25/x
  3. Step 3: Cross multiply
    21,009.75x = 28,993.47 × 12,626.25
  4. Step 4: Simplify right side
    21,009.75x = 366,078,800.59
  5. Step 5: Solve for x
    x = 366,078,800.59/21,009.75
  6. Step 6: Final answer
    x = 17,424.23

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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.