Home / 30,638.82-42,285.48-18,699.60

Finding the Fourth Proportional to 30,638.82, 42,285.48 and 18,699.60

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Solution

The fourth proportional to 30,638.82, 42,285.48 and 18,699.60 is: 25,807.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,638.82 : 42,285.48 = 18,699.60 : x
  2. Step 2: Convert to fraction form
    30,638.82/42,285.48 = 18,699.60/x
  3. Step 3: Cross multiply
    30,638.82x = 42,285.48 × 18,699.60
  4. Step 4: Simplify right side
    30,638.82x = 790,721,561.81
  5. Step 5: Solve for x
    x = 790,721,561.81/30,638.82
  6. Step 6: Final answer
    x = 25,807.83

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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.