Home / 20,912.07-28,856.73-12,412.74

Finding the Fourth Proportional to 20,912.07, 28,856.73 and 12,412.74

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Solution

The fourth proportional to 20,912.07, 28,856.73 and 12,412.74 is: 17,128.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.07 : 28,856.73 = 12,412.74 : x
  2. Step 2: Convert to fraction form
    20,912.07/28,856.73 = 12,412.74/x
  3. Step 3: Cross multiply
    20,912.07x = 28,856.73 × 12,412.74
  4. Step 4: Simplify right side
    20,912.07x = 358,191,045.63
  5. Step 5: Solve for x
    x = 358,191,045.63/20,912.07
  6. Step 6: Final answer
    x = 17,128.44

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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.