Home / 15,422.54-21,280.81-8,708.02

Finding the Fourth Proportional to 15,422.54, 21,280.81 and 8,708.02

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Solution

The fourth proportional to 15,422.54, 21,280.81 and 8,708.02 is: 12,015.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,422.54 : 21,280.81 = 8,708.02 : x
  2. Step 2: Convert to fraction form
    15,422.54/21,280.81 = 8,708.02/x
  3. Step 3: Cross multiply
    15,422.54x = 21,280.81 × 8,708.02
  4. Step 4: Simplify right side
    15,422.54x = 185,313,719.10
  5. Step 5: Solve for x
    x = 185,313,719.10/15,422.54
  6. Step 6: Final answer
    x = 12,015.77

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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.