Home / 28,392.64-39,164.16-20,311.36

Finding the Fourth Proportional to 28,392.64, 39,164.16 and 20,311.36

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Solution

The fourth proportional to 28,392.64, 39,164.16 and 20,311.36 is: 28,017.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,392.64 : 39,164.16 = 20,311.36 : x
  2. Step 2: Convert to fraction form
    28,392.64/39,164.16 = 20,311.36/x
  3. Step 3: Cross multiply
    28,392.64x = 39,164.16 × 20,311.36
  4. Step 4: Simplify right side
    28,392.64x = 795,477,352.86
  5. Step 5: Solve for x
    x = 795,477,352.86/28,392.64
  6. Step 6: Final answer
    x = 28,017.03

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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.