Home / 12,777.58-19,158.17-8,389.91

Finding the Fourth Proportional to 12,777.58, 19,158.17 and 8,389.91

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Solution

The fourth proportional to 12,777.58, 19,158.17 and 8,389.91 is: 12,579.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,777.58 : 19,158.17 = 8,389.91 : x
  2. Step 2: Convert to fraction form
    12,777.58/19,158.17 = 8,389.91/x
  3. Step 3: Cross multiply
    12,777.58x = 19,158.17 × 8,389.91
  4. Step 4: Simplify right side
    12,777.58x = 160,735,328.01
  5. Step 5: Solve for x
    x = 160,735,328.01/12,777.58
  6. Step 6: Final answer
    x = 12,579.48

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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.