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Finding the Fourth Proportional to 28,495.50, 39,323.07 and 15,920.34

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Solution

The fourth proportional to 28,495.50, 39,323.07 and 15,920.34 is: 21,969.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,495.50 : 39,323.07 = 15,920.34 : x
  2. Step 2: Convert to fraction form
    28,495.50/39,323.07 = 15,920.34/x
  3. Step 3: Cross multiply
    28,495.50x = 39,323.07 × 15,920.34
  4. Step 4: Simplify right side
    28,495.50x = 626,036,644.24
  5. Step 5: Solve for x
    x = 626,036,644.24/28,495.50
  6. Step 6: Final answer
    x = 21,969.67

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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.