Home / 30,898.88-42,663.84-18,978.56

Finding the Fourth Proportional to 30,898.88, 42,663.84 and 18,978.56

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Solution

The fourth proportional to 30,898.88, 42,663.84 and 18,978.56 is: 26,204.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,898.88 : 42,663.84 = 18,978.56 : x
  2. Step 2: Convert to fraction form
    30,898.88/42,663.84 = 18,978.56/x
  3. Step 3: Cross multiply
    30,898.88x = 42,663.84 × 18,978.56
  4. Step 4: Simplify right side
    30,898.88x = 809,698,247.27
  5. Step 5: Solve for x
    x = 809,698,247.27/30,898.88
  6. Step 6: Final answer
    x = 26,204.78

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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.