Home / 12,903.49-19,355.21-8,519.91

Finding the Fourth Proportional to 12,903.49, 19,355.21 and 8,519.91

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Solution

The fourth proportional to 12,903.49, 19,355.21 and 8,519.91 is: 12,779.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.49 : 19,355.21 = 8,519.91 : x
  2. Step 2: Convert to fraction form
    12,903.49/19,355.21 = 8,519.91/x
  3. Step 3: Cross multiply
    12,903.49x = 19,355.21 × 8,519.91
  4. Step 4: Simplify right side
    12,903.49x = 164,904,647.23
  5. Step 5: Solve for x
    x = 164,904,647.23/12,903.49
  6. Step 6: Final answer
    x = 12,779.85

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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.