Home / 20,510.25-28,304.16-11,078.81

Finding the Fourth Proportional to 20,510.25, 28,304.16 and 11,078.81

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Solution

The fourth proportional to 20,510.25, 28,304.16 and 11,078.81 is: 15,288.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.25 : 28,304.16 = 11,078.81 : x
  2. Step 2: Convert to fraction form
    20,510.25/28,304.16 = 11,078.81/x
  3. Step 3: Cross multiply
    20,510.25x = 28,304.16 × 11,078.81
  4. Step 4: Simplify right side
    20,510.25x = 313,576,440.06
  5. Step 5: Solve for x
    x = 313,576,440.06/20,510.25
  6. Step 6: Final answer
    x = 15,288.77

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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.