Home / 12,890.45-19,340.27-7,954.34

Finding the Fourth Proportional to 12,890.45, 19,340.27 and 7,954.34

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Solution

The fourth proportional to 12,890.45, 19,340.27 and 7,954.34 is: 11,934.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.45 : 19,340.27 = 7,954.34 : x
  2. Step 2: Convert to fraction form
    12,890.45/19,340.27 = 7,954.34/x
  3. Step 3: Cross multiply
    12,890.45x = 19,340.27 × 7,954.34
  4. Step 4: Simplify right side
    12,890.45x = 153,838,946.80
  5. Step 5: Solve for x
    x = 153,838,946.80/12,890.45
  6. Step 6: Final answer
    x = 11,934.34

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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.