Home / 12,078.69-18,117.15-3,312.92

Finding the Fourth Proportional to 12,078.69, 18,117.15 and 3,312.92

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Solution

The fourth proportional to 12,078.69, 18,117.15 and 3,312.92 is: 4,969.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.69 : 18,117.15 = 3,312.92 : x
  2. Step 2: Convert to fraction form
    12,078.69/18,117.15 = 3,312.92/x
  3. Step 3: Cross multiply
    12,078.69x = 18,117.15 × 3,312.92
  4. Step 4: Simplify right side
    12,078.69x = 60,020,577.99
  5. Step 5: Solve for x
    x = 60,020,577.99/12,078.69
  6. Step 6: Final answer
    x = 4,969.13

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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.