Home / 13,920.28-20,852.60-8,370.64

Finding the Fourth Proportional to 13,920.28, 20,852.60 and 8,370.64

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Solution

The fourth proportional to 13,920.28, 20,852.60 and 8,370.64 is: 12,539.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.28 : 20,852.60 = 8,370.64 : x
  2. Step 2: Convert to fraction form
    13,920.28/20,852.60 = 8,370.64/x
  3. Step 3: Cross multiply
    13,920.28x = 20,852.60 × 8,370.64
  4. Step 4: Simplify right side
    13,920.28x = 174,549,607.66
  5. Step 5: Solve for x
    x = 174,549,607.66/13,920.28
  6. Step 6: Final answer
    x = 12,539.23

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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.