Home / 30,839.81-42,514.38-20,210.99

Finding the Fourth Proportional to 30,839.81, 42,514.38 and 20,210.99

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Solution

The fourth proportional to 30,839.81, 42,514.38 and 20,210.99 is: 27,861.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,839.81 : 42,514.38 = 20,210.99 : x
  2. Step 2: Convert to fraction form
    30,839.81/42,514.38 = 20,210.99/x
  3. Step 3: Cross multiply
    30,839.81x = 42,514.38 × 20,210.99
  4. Step 4: Simplify right side
    30,839.81x = 859,257,496.46
  5. Step 5: Solve for x
    x = 859,257,496.46/30,839.81
  6. Step 6: Final answer
    x = 27,861.96

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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.