Home / 6,912.08-10,368.64-1,981.68

Finding the Fourth Proportional to 6,912.08, 10,368.64 and 1,981.68

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Solution

The fourth proportional to 6,912.08, 10,368.64 and 1,981.68 is: 2,972.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,912.08 : 10,368.64 = 1,981.68 : x
  2. Step 2: Convert to fraction form
    6,912.08/10,368.64 = 1,981.68/x
  3. Step 3: Cross multiply
    6,912.08x = 10,368.64 × 1,981.68
  4. Step 4: Simplify right side
    6,912.08x = 20,547,326.52
  5. Step 5: Solve for x
    x = 20,547,326.52/6,912.08
  6. Step 6: Final answer
    x = 2,972.67

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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.