Home / 30,686.86-42,333.57-19,930.97

Finding the Fourth Proportional to 30,686.86, 42,333.57 and 19,930.97

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Solution

The fourth proportional to 30,686.86, 42,333.57 and 19,930.97 is: 27,495.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,686.86 : 42,333.57 = 19,930.97 : x
  2. Step 2: Convert to fraction form
    30,686.86/42,333.57 = 19,930.97/x
  3. Step 3: Cross multiply
    30,686.86x = 42,333.57 × 19,930.97
  4. Step 4: Simplify right side
    30,686.86x = 843,749,219.50
  5. Step 5: Solve for x
    x = 843,749,219.50/30,686.86
  6. Step 6: Final answer
    x = 27,495.46

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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.