Home / 30,968.30-42,749.34-20,910.36

Finding the Fourth Proportional to 30,968.30, 42,749.34 and 20,910.36

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Solution

The fourth proportional to 30,968.30, 42,749.34 and 20,910.36 is: 28,865.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.30 : 42,749.34 = 20,910.36 : x
  2. Step 2: Convert to fraction form
    30,968.30/42,749.34 = 20,910.36/x
  3. Step 3: Cross multiply
    30,968.30x = 42,749.34 × 20,910.36
  4. Step 4: Simplify right side
    30,968.30x = 893,904,171.06
  5. Step 5: Solve for x
    x = 893,904,171.06/30,968.30
  6. Step 6: Final answer
    x = 28,865.13

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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.