Home / 13,728.76-18,946.66-7,760.98

Finding the Fourth Proportional to 13,728.76, 18,946.66 and 7,760.98

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Solution

The fourth proportional to 13,728.76, 18,946.66 and 7,760.98 is: 10,710.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.76 : 18,946.66 = 7,760.98 : x
  2. Step 2: Convert to fraction form
    13,728.76/18,946.66 = 7,760.98/x
  3. Step 3: Cross multiply
    13,728.76x = 18,946.66 × 7,760.98
  4. Step 4: Simplify right side
    13,728.76x = 147,044,649.33
  5. Step 5: Solve for x
    x = 147,044,649.33/13,728.76
  6. Step 6: Final answer
    x = 10,710.70

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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.