Home / 12,946.14-17,865.10-7,918.80

Finding the Fourth Proportional to 12,946.14, 17,865.10 and 7,918.80

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Solution

The fourth proportional to 12,946.14, 17,865.10 and 7,918.80 is: 10,927.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,946.14 : 17,865.10 = 7,918.80 : x
  2. Step 2: Convert to fraction form
    12,946.14/17,865.10 = 7,918.80/x
  3. Step 3: Cross multiply
    12,946.14x = 17,865.10 × 7,918.80
  4. Step 4: Simplify right side
    12,946.14x = 141,470,153.88
  5. Step 5: Solve for x
    x = 141,470,153.88/12,946.14
  6. Step 6: Final answer
    x = 10,927.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.