Home / 30,870.12-46,299.78-8,678.22

Finding the Fourth Proportional to 30,870.12, 46,299.78 and 8,678.22

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Solution

The fourth proportional to 30,870.12, 46,299.78 and 8,678.22 is: 13,015.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,870.12 : 46,299.78 = 8,678.22 : x
  2. Step 2: Convert to fraction form
    30,870.12/46,299.78 = 8,678.22/x
  3. Step 3: Cross multiply
    30,870.12x = 46,299.78 × 8,678.22
  4. Step 4: Simplify right side
    30,870.12x = 401,799,676.79
  5. Step 5: Solve for x
    x = 401,799,676.79/30,870.12
  6. Step 6: Final answer
    x = 13,015.81

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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.