Home / 30,973.16-42,749.75-20,363.78

Finding the Fourth Proportional to 30,973.16, 42,749.75 and 20,363.78

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Solution

The fourth proportional to 30,973.16, 42,749.75 and 20,363.78 is: 28,106.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,973.16 : 42,749.75 = 20,363.78 : x
  2. Step 2: Convert to fraction form
    30,973.16/42,749.75 = 20,363.78/x
  3. Step 3: Cross multiply
    30,973.16x = 42,749.75 × 20,363.78
  4. Step 4: Simplify right side
    30,973.16x = 870,546,504.06
  5. Step 5: Solve for x
    x = 870,546,504.06/30,973.16
  6. Step 6: Final answer
    x = 28,106.48

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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.