Home / 30,882.07-42,631.95-20,690.65

Finding the Fourth Proportional to 30,882.07, 42,631.95 and 20,690.65

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Solution

The fourth proportional to 30,882.07, 42,631.95 and 20,690.65 is: 28,562.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,882.07 : 42,631.95 = 20,690.65 : x
  2. Step 2: Convert to fraction form
    30,882.07/42,631.95 = 20,690.65/x
  3. Step 3: Cross multiply
    30,882.07x = 42,631.95 × 20,690.65
  4. Step 4: Simplify right side
    30,882.07x = 882,082,756.27
  5. Step 5: Solve for x
    x = 882,082,756.27/30,882.07
  6. Step 6: Final answer
    x = 28,562.94

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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.