Home / 28,534.70-39,379.04-15,787.67

Finding the Fourth Proportional to 28,534.70, 39,379.04 and 15,787.67

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Solution

The fourth proportional to 28,534.70, 39,379.04 and 15,787.67 is: 21,787.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,534.70 : 39,379.04 = 15,787.67 : x
  2. Step 2: Convert to fraction form
    28,534.70/39,379.04 = 15,787.67/x
  3. Step 3: Cross multiply
    28,534.70x = 39,379.04 × 15,787.67
  4. Step 4: Simplify right side
    28,534.70x = 621,703,379.22
  5. Step 5: Solve for x
    x = 621,703,379.22/28,534.70
  6. Step 6: Final answer
    x = 21,787.63

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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.