Home / 30,914.11-42,664.30-19,430.88

Finding the Fourth Proportional to 30,914.11, 42,664.30 and 19,430.88

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Solution

The fourth proportional to 30,914.11, 42,664.30 and 19,430.88 is: 26,816.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,914.11 : 42,664.30 = 19,430.88 : x
  2. Step 2: Convert to fraction form
    30,914.11/42,664.30 = 19,430.88/x
  3. Step 3: Cross multiply
    30,914.11x = 42,664.30 × 19,430.88
  4. Step 4: Simplify right side
    30,914.11x = 829,004,893.58
  5. Step 5: Solve for x
    x = 829,004,893.58/30,914.11
  6. Step 6: Final answer
    x = 26,816.39

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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.