Home / 12,278.16-16,940.88-6,972

Finding the Fourth Proportional to 12,278.16, 16,940.88 and 6,972

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Solution

The fourth proportional to 12,278.16, 16,940.88 and 6,972 is: 9,619.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.16 : 16,940.88 = 6,972 : x
  2. Step 2: Convert to fraction form
    12,278.16/16,940.88 = 6,972/x
  3. Step 3: Cross multiply
    12,278.16x = 16,940.88 × 6,972
  4. Step 4: Simplify right side
    12,278.16x = 118,111,815.36
  5. Step 5: Solve for x
    x = 118,111,815.36/12,278.16
  6. Step 6: Final answer
    x = 9,619.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.