Home / 28,180.34-38,890.04-15,605.09

Finding the Fourth Proportional to 28,180.34, 38,890.04 and 15,605.09

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Solution

The fourth proportional to 28,180.34, 38,890.04 and 15,605.09 is: 21,535.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.34 : 38,890.04 = 15,605.09 : x
  2. Step 2: Convert to fraction form
    28,180.34/38,890.04 = 15,605.09/x
  3. Step 3: Cross multiply
    28,180.34x = 38,890.04 × 15,605.09
  4. Step 4: Simplify right side
    28,180.34x = 606,882,574.30
  5. Step 5: Solve for x
    x = 606,882,574.30/28,180.34
  6. Step 6: Final answer
    x = 21,535.67

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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.