Home / 20,752.51-28,638.71-11,321.23

Finding the Fourth Proportional to 20,752.51, 28,638.71 and 11,321.23

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Solution

The fourth proportional to 20,752.51, 28,638.71 and 11,321.23 is: 15,623.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.51 : 28,638.71 = 11,321.23 : x
  2. Step 2: Convert to fraction form
    20,752.51/28,638.71 = 11,321.23/x
  3. Step 3: Cross multiply
    20,752.51x = 28,638.71 × 11,321.23
  4. Step 4: Simplify right side
    20,752.51x = 324,225,422.81
  5. Step 5: Solve for x
    x = 324,225,422.81/20,752.51
  6. Step 6: Final answer
    x = 15,623.43

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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.