Home / 28,900.40-39,882.31-20,298.67

Finding the Fourth Proportional to 28,900.40, 39,882.31 and 20,298.67

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Solution

The fourth proportional to 28,900.40, 39,882.31 and 20,298.67 is: 28,011.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,900.40 : 39,882.31 = 20,298.67 : x
  2. Step 2: Convert to fraction form
    28,900.40/39,882.31 = 20,298.67/x
  3. Step 3: Cross multiply
    28,900.40x = 39,882.31 × 20,298.67
  4. Step 4: Simplify right side
    28,900.40x = 809,557,849.53
  5. Step 5: Solve for x
    x = 809,557,849.53/28,900.40
  6. Step 6: Final answer
    x = 28,011.99

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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.