Home / 20,510.14-28,304.02-11,078.70

Finding the Fourth Proportional to 20,510.14, 28,304.02 and 11,078.70

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Solution

The fourth proportional to 20,510.14, 28,304.02 and 11,078.70 is: 15,288.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.14 : 28,304.02 = 11,078.70 : x
  2. Step 2: Convert to fraction form
    20,510.14/28,304.02 = 11,078.70/x
  3. Step 3: Cross multiply
    20,510.14x = 28,304.02 × 11,078.70
  4. Step 4: Simplify right side
    20,510.14x = 313,571,746.37
  5. Step 5: Solve for x
    x = 313,571,746.37/20,510.14
  6. Step 6: Final answer
    x = 15,288.62

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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.