Home / 20,712.68-28,583.81-11,281.23

Finding the Fourth Proportional to 20,712.68, 28,583.81 and 11,281.23

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Solution

The fourth proportional to 20,712.68, 28,583.81 and 11,281.23 is: 15,568.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.68 : 28,583.81 = 11,281.23 : x
  2. Step 2: Convert to fraction form
    20,712.68/28,583.81 = 11,281.23/x
  3. Step 3: Cross multiply
    20,712.68x = 28,583.81 × 11,281.23
  4. Step 4: Simplify right side
    20,712.68x = 322,460,478.48
  5. Step 5: Solve for x
    x = 322,460,478.48/20,712.68
  6. Step 6: Final answer
    x = 15,568.27

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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.