Home / 30,830.60-42,535.82-20,070.56

Finding the Fourth Proportional to 30,830.60, 42,535.82 and 20,070.56

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Solution

The fourth proportional to 30,830.60, 42,535.82 and 20,070.56 is: 27,690.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,830.60 : 42,535.82 = 20,070.56 : x
  2. Step 2: Convert to fraction form
    30,830.60/42,535.82 = 20,070.56/x
  3. Step 3: Cross multiply
    30,830.60x = 42,535.82 × 20,070.56
  4. Step 4: Simplify right side
    30,830.60x = 853,717,414.43
  5. Step 5: Solve for x
    x = 853,717,414.43/30,830.60
  6. Step 6: Final answer
    x = 27,690.59

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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.