Home / 20,357.56-28,099.51-12,403.70

Finding the Fourth Proportional to 20,357.56, 28,099.51 and 12,403.70

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Solution

The fourth proportional to 20,357.56, 28,099.51 and 12,403.70 is: 17,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.56 : 28,099.51 = 12,403.70 : x
  2. Step 2: Convert to fraction form
    20,357.56/28,099.51 = 12,403.70/x
  3. Step 3: Cross multiply
    20,357.56x = 28,099.51 × 12,403.70
  4. Step 4: Simplify right side
    20,357.56x = 348,537,826.05
  5. Step 5: Solve for x
    x = 348,537,826.05/20,357.56
  6. Step 6: Final answer
    x = 17,120.80

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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.