Home / 20,680.60-28,543.34-12,295.48

Finding the Fourth Proportional to 20,680.60, 28,543.34 and 12,295.48

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Solution

The fourth proportional to 20,680.60, 28,543.34 and 12,295.48 is: 16,970.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.60 : 28,543.34 = 12,295.48 : x
  2. Step 2: Convert to fraction form
    20,680.60/28,543.34 = 12,295.48/x
  3. Step 3: Cross multiply
    20,680.60x = 28,543.34 × 12,295.48
  4. Step 4: Simplify right side
    20,680.60x = 350,954,066.10
  5. Step 5: Solve for x
    x = 350,954,066.10/20,680.60
  6. Step 6: Final answer
    x = 16,970.21

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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.