Home / 30,898.98-42,675.57-20,809.85

Finding the Fourth Proportional to 30,898.98, 42,675.57 and 20,809.85

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Solution

The fourth proportional to 30,898.98, 42,675.57 and 20,809.85 is: 28,741.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,898.98 : 42,675.57 = 20,809.85 : x
  2. Step 2: Convert to fraction form
    30,898.98/42,675.57 = 20,809.85/x
  3. Step 3: Cross multiply
    30,898.98x = 42,675.57 × 20,809.85
  4. Step 4: Simplify right side
    30,898.98x = 888,071,996.99
  5. Step 5: Solve for x
    x = 888,071,996.99/30,898.98
  6. Step 6: Final answer
    x = 28,741.14

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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.