Home / 28,811.76-39,771.24-19,407.12

Finding the Fourth Proportional to 28,811.76, 39,771.24 and 19,407.12

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Solution

The fourth proportional to 28,811.76, 39,771.24 and 19,407.12 is: 26,789.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,811.76 : 39,771.24 = 19,407.12 : x
  2. Step 2: Convert to fraction form
    28,811.76/39,771.24 = 19,407.12/x
  3. Step 3: Cross multiply
    28,811.76x = 39,771.24 × 19,407.12
  4. Step 4: Simplify right side
    28,811.76x = 771,845,227.23
  5. Step 5: Solve for x
    x = 771,845,227.23/28,811.76
  6. Step 6: Final answer
    x = 26,789.24

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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.