Home / 20,486.24-28,271.58-12,528.32

Finding the Fourth Proportional to 20,486.24, 28,271.58 and 12,528.32

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Solution

The fourth proportional to 20,486.24, 28,271.58 and 12,528.32 is: 17,289.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.24 : 28,271.58 = 12,528.32 : x
  2. Step 2: Convert to fraction form
    20,486.24/28,271.58 = 12,528.32/x
  3. Step 3: Cross multiply
    20,486.24x = 28,271.58 × 12,528.32
  4. Step 4: Simplify right side
    20,486.24x = 354,195,401.15
  5. Step 5: Solve for x
    x = 354,195,401.15/20,486.24
  6. Step 6: Final answer
    x = 17,289.43

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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.