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Finding the Fourth Proportional to 12,763.91, 19,143.34 and 12,130.99

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Solution

The fourth proportional to 12,763.91, 19,143.34 and 12,130.99 is: 18,194.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,763.91 : 19,143.34 = 12,130.99 : x
  2. Step 2: Convert to fraction form
    12,763.91/19,143.34 = 12,130.99/x
  3. Step 3: Cross multiply
    12,763.91x = 19,143.34 × 12,130.99
  4. Step 4: Simplify right side
    12,763.91x = 232,227,587.92
  5. Step 5: Solve for x
    x = 232,227,587.92/12,763.91
  6. Step 6: Final answer
    x = 18,194.08

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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.