Home / 20,816.76-28,700-15,152.44

Finding the Fourth Proportional to 20,816.76, 28,700 and 15,152.44

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Solution

The fourth proportional to 20,816.76, 28,700 and 15,152.44 is: 20,890.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.76 : 28,700 = 15,152.44 : x
  2. Step 2: Convert to fraction form
    20,816.76/28,700 = 15,152.44/x
  3. Step 3: Cross multiply
    20,816.76x = 28,700 × 15,152.44
  4. Step 4: Simplify right side
    20,816.76x = 434,875,028
  5. Step 5: Solve for x
    x = 434,875,028/20,816.76
  6. Step 6: Final answer
    x = 20,890.62

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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.