Home / 7,981.78-11,018.28-4,996.98

Finding the Fourth Proportional to 7,981.78, 11,018.28 and 4,996.98

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Solution

The fourth proportional to 7,981.78, 11,018.28 and 4,996.98 is: 6,897.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.78 : 11,018.28 = 4,996.98 : x
  2. Step 2: Convert to fraction form
    7,981.78/11,018.28 = 4,996.98/x
  3. Step 3: Cross multiply
    7,981.78x = 11,018.28 × 4,996.98
  4. Step 4: Simplify right side
    7,981.78x = 55,058,124.79
  5. Step 5: Solve for x
    x = 55,058,124.79/7,981.78
  6. Step 6: Final answer
    x = 6,897.98

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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.