Home / 21,289.32-31,936.16-8,152.72

Finding the Fourth Proportional to 21,289.32, 31,936.16 and 8,152.72

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Solution

The fourth proportional to 21,289.32, 31,936.16 and 8,152.72 is: 12,229.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.32 : 31,936.16 = 8,152.72 : x
  2. Step 2: Convert to fraction form
    21,289.32/31,936.16 = 8,152.72/x
  3. Step 3: Cross multiply
    21,289.32x = 31,936.16 × 8,152.72
  4. Step 4: Simplify right side
    21,289.32x = 260,366,570.36
  5. Step 5: Solve for x
    x = 260,366,570.36/21,289.32
  6. Step 6: Final answer
    x = 12,229.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.