Home / 30,630.28-42,273.70-18,691.08

Finding the Fourth Proportional to 30,630.28, 42,273.70 and 18,691.08

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Solution

The fourth proportional to 30,630.28, 42,273.70 and 18,691.08 is: 25,796.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.28 : 42,273.70 = 18,691.08 : x
  2. Step 2: Convert to fraction form
    30,630.28/42,273.70 = 18,691.08/x
  3. Step 3: Cross multiply
    30,630.28x = 42,273.70 × 18,691.08
  4. Step 4: Simplify right side
    30,630.28x = 790,141,108.60
  5. Step 5: Solve for x
    x = 790,141,108.60/30,630.28
  6. Step 6: Final answer
    x = 25,796.08

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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.