Home / 20,670.84-30,856.32-19,128.96

Finding the Fourth Proportional to 20,670.84, 30,856.32 and 19,128.96

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Solution

The fourth proportional to 20,670.84, 30,856.32 and 19,128.96 is: 28,554.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.84 : 30,856.32 = 19,128.96 : x
  2. Step 2: Convert to fraction form
    20,670.84/30,856.32 = 19,128.96/x
  3. Step 3: Cross multiply
    20,670.84x = 30,856.32 × 19,128.96
  4. Step 4: Simplify right side
    20,670.84x = 590,249,311.03
  5. Step 5: Solve for x
    x = 590,249,311.03/20,670.84
  6. Step 6: Final answer
    x = 28,554.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.