Home / 30,948.33-42,743.87-20,859.38

Finding the Fourth Proportional to 30,948.33, 42,743.87 and 20,859.38

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Solution

The fourth proportional to 30,948.33, 42,743.87 and 20,859.38 is: 28,809.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,948.33 : 42,743.87 = 20,859.38 : x
  2. Step 2: Convert to fraction form
    30,948.33/42,743.87 = 20,859.38/x
  3. Step 3: Cross multiply
    30,948.33x = 42,743.87 × 20,859.38
  4. Step 4: Simplify right side
    30,948.33x = 891,610,627.00
  5. Step 5: Solve for x
    x = 891,610,627.00/30,948.33
  6. Step 6: Final answer
    x = 28,809.65

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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.