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Finding the Fourth Proportional to 12,948.70, 19,427.85 and 12,468.70

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Solution

The fourth proportional to 12,948.70, 19,427.85 and 12,468.70 is: 18,707.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,948.70 : 19,427.85 = 12,468.70 : x
  2. Step 2: Convert to fraction form
    12,948.70/19,427.85 = 12,468.70/x
  3. Step 3: Cross multiply
    12,948.70x = 19,427.85 × 12,468.70
  4. Step 4: Simplify right side
    12,948.70x = 242,240,033.30
  5. Step 5: Solve for x
    x = 242,240,033.30/12,948.70
  6. Step 6: Final answer
    x = 18,707.67

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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.