Home / 7,988.16-11,018.92-4,998.78

Finding the Fourth Proportional to 7,988.16, 11,018.92 and 4,998.78

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Solution

The fourth proportional to 7,988.16, 11,018.92 and 4,998.78 is: 6,895.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.16 : 11,018.92 = 4,998.78 : x
  2. Step 2: Convert to fraction form
    7,988.16/11,018.92 = 4,998.78/x
  3. Step 3: Cross multiply
    7,988.16x = 11,018.92 × 4,998.78
  4. Step 4: Simplify right side
    7,988.16x = 55,081,156.92
  5. Step 5: Solve for x
    x = 55,081,156.92/7,988.16
  6. Step 6: Final answer
    x = 6,895.35

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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.