Home / 30,965.97-42,750.75-20,386.35

Finding the Fourth Proportional to 30,965.97, 42,750.75 and 20,386.35

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Solution

The fourth proportional to 30,965.97, 42,750.75 and 20,386.35 is: 28,144.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,965.97 : 42,750.75 = 20,386.35 : x
  2. Step 2: Convert to fraction form
    30,965.97/42,750.75 = 20,386.35/x
  3. Step 3: Cross multiply
    30,965.97x = 42,750.75 × 20,386.35
  4. Step 4: Simplify right side
    30,965.97x = 871,531,752.26
  5. Step 5: Solve for x
    x = 871,531,752.26/30,965.97
  6. Step 6: Final answer
    x = 28,144.82

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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.