Home / 19,921.75-29,886.72-7,438.76

Finding the Fourth Proportional to 19,921.75, 29,886.72 and 7,438.76

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Solution

The fourth proportional to 19,921.75, 29,886.72 and 7,438.76 is: 11,159.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.75 : 29,886.72 = 7,438.76 : x
  2. Step 2: Convert to fraction form
    19,921.75/29,886.72 = 7,438.76/x
  3. Step 3: Cross multiply
    19,921.75x = 29,886.72 × 7,438.76
  4. Step 4: Simplify right side
    19,921.75x = 222,320,197.91
  5. Step 5: Solve for x
    x = 222,320,197.91/19,921.75
  6. Step 6: Final answer
    x = 11,159.67

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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.