Home / 21,216.90-31,826.16-8,070.60

Finding the Fourth Proportional to 21,216.90, 31,826.16 and 8,070.60

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Solution

The fourth proportional to 21,216.90, 31,826.16 and 8,070.60 is: 12,106.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.90 : 31,826.16 = 8,070.60 : x
  2. Step 2: Convert to fraction form
    21,216.90/31,826.16 = 8,070.60/x
  3. Step 3: Cross multiply
    21,216.90x = 31,826.16 × 8,070.60
  4. Step 4: Simplify right side
    21,216.90x = 256,856,206.90
  5. Step 5: Solve for x
    x = 256,856,206.90/21,216.90
  6. Step 6: Final answer
    x = 12,106.21

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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.