Home / 30,531.31-42,147.64-20,466.33

Finding the Fourth Proportional to 30,531.31, 42,147.64 and 20,466.33

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Solution

The fourth proportional to 30,531.31, 42,147.64 and 20,466.33 is: 28,253.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,531.31 : 42,147.64 = 20,466.33 : x
  2. Step 2: Convert to fraction form
    30,531.31/42,147.64 = 20,466.33/x
  3. Step 3: Cross multiply
    30,531.31x = 42,147.64 × 20,466.33
  4. Step 4: Simplify right side
    30,531.31x = 862,607,508.96
  5. Step 5: Solve for x
    x = 862,607,508.96/30,531.31
  6. Step 6: Final answer
    x = 28,253.21

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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.