Home / 18,948.60-26,138.16-12,978.36

Finding the Fourth Proportional to 18,948.60, 26,138.16 and 12,978.36

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Solution

The fourth proportional to 18,948.60, 26,138.16 and 12,978.36 is: 17,902.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,948.60 : 26,138.16 = 12,978.36 : x
  2. Step 2: Convert to fraction form
    18,948.60/26,138.16 = 12,978.36/x
  3. Step 3: Cross multiply
    18,948.60x = 26,138.16 × 12,978.36
  4. Step 4: Simplify right side
    18,948.60x = 339,230,450.22
  5. Step 5: Solve for x
    x = 339,230,450.22/18,948.60
  6. Step 6: Final answer
    x = 17,902.67

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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.