Home / 30,938.31-42,672.80-28,394.27

Finding the Fourth Proportional to 30,938.31, 42,672.80 and 28,394.27

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Solution

The fourth proportional to 30,938.31, 42,672.80 and 28,394.27 is: 39,163.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,938.31 : 42,672.80 = 28,394.27 : x
  2. Step 2: Convert to fraction form
    30,938.31/42,672.80 = 28,394.27/x
  3. Step 3: Cross multiply
    30,938.31x = 42,672.80 × 28,394.27
  4. Step 4: Simplify right side
    30,938.31x = 1,211,662,649.52
  5. Step 5: Solve for x
    x = 1,211,662,649.52/30,938.31
  6. Step 6: Final answer
    x = 39,163.83

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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.