Home / 14,109.86-21,166.12-3,978.20

Finding the Fourth Proportional to 14,109.86, 21,166.12 and 3,978.20

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Solution

The fourth proportional to 14,109.86, 21,166.12 and 3,978.20 is: 5,967.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,109.86 : 21,166.12 = 3,978.20 : x
  2. Step 2: Convert to fraction form
    14,109.86/21,166.12 = 3,978.20/x
  3. Step 3: Cross multiply
    14,109.86x = 21,166.12 × 3,978.20
  4. Step 4: Simplify right side
    14,109.86x = 84,203,058.58
  5. Step 5: Solve for x
    x = 84,203,058.58/14,109.86
  6. Step 6: Final answer
    x = 5,967.67

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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.