Home / 15,774.78-21,742.81-13,855.69

Finding the Fourth Proportional to 15,774.78, 21,742.81 and 13,855.69

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Solution

The fourth proportional to 15,774.78, 21,742.81 and 13,855.69 is: 19,097.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,774.78 : 21,742.81 = 13,855.69 : x
  2. Step 2: Convert to fraction form
    15,774.78/21,742.81 = 13,855.69/x
  3. Step 3: Cross multiply
    15,774.78x = 21,742.81 × 13,855.69
  4. Step 4: Simplify right side
    15,774.78x = 301,261,627.63
  5. Step 5: Solve for x
    x = 301,261,627.63/15,774.78
  6. Step 6: Final answer
    x = 19,097.67

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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.