Home / 5,678.81-8,518.25-1,981.02

Finding the Fourth Proportional to 5,678.81, 8,518.25 and 1,981.02

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Solution

The fourth proportional to 5,678.81, 8,518.25 and 1,981.02 is: 2,971.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.81 : 8,518.25 = 1,981.02 : x
  2. Step 2: Convert to fraction form
    5,678.81/8,518.25 = 1,981.02/x
  3. Step 3: Cross multiply
    5,678.81x = 8,518.25 × 1,981.02
  4. Step 4: Simplify right side
    5,678.81x = 16,874,860.51
  5. Step 5: Solve for x
    x = 16,874,860.51/5,678.81
  6. Step 6: Final answer
    x = 2,971.55

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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.