Home / 30,870.22-46,316.43-12,139.87

Finding the Fourth Proportional to 30,870.22, 46,316.43 and 12,139.87

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Solution

The fourth proportional to 30,870.22, 46,316.43 and 12,139.87 is: 18,214.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,870.22 : 46,316.43 = 12,139.87 : x
  2. Step 2: Convert to fraction form
    30,870.22/46,316.43 = 12,139.87/x
  3. Step 3: Cross multiply
    30,870.22x = 46,316.43 × 12,139.87
  4. Step 4: Simplify right side
    30,870.22x = 562,275,439.06
  5. Step 5: Solve for x
    x = 562,275,439.06/30,870.22
  6. Step 6: Final answer
    x = 18,214.17

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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.