Home / 20,821.08-28,734.12-12,328.05

Finding the Fourth Proportional to 20,821.08, 28,734.12 and 12,328.05

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Solution

The fourth proportional to 20,821.08, 28,734.12 and 12,328.05 is: 17,013.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.08 : 28,734.12 = 12,328.05 : x
  2. Step 2: Convert to fraction form
    20,821.08/28,734.12 = 12,328.05/x
  3. Step 3: Cross multiply
    20,821.08x = 28,734.12 × 12,328.05
  4. Step 4: Simplify right side
    20,821.08x = 354,235,668.07
  5. Step 5: Solve for x
    x = 354,235,668.07/20,821.08
  6. Step 6: Final answer
    x = 17,013.32

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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.