Home / 12,821.80-19,254.30-8,458.60

Finding the Fourth Proportional to 12,821.80, 19,254.30 and 8,458.60

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Solution

The fourth proportional to 12,821.80, 19,254.30 and 8,458.60 is: 12,702.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.80 : 19,254.30 = 8,458.60 : x
  2. Step 2: Convert to fraction form
    12,821.80/19,254.30 = 8,458.60/x
  3. Step 3: Cross multiply
    12,821.80x = 19,254.30 × 8,458.60
  4. Step 4: Simplify right side
    12,821.80x = 162,864,421.98
  5. Step 5: Solve for x
    x = 162,864,421.98/12,821.80
  6. Step 6: Final answer
    x = 12,702.15

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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.