Home / 20,816.04-28,709.80-18,428.52

Finding the Fourth Proportional to 20,816.04, 28,709.80 and 18,428.52

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Solution

The fourth proportional to 20,816.04, 28,709.80 and 18,428.52 is: 25,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.04 : 28,709.80 = 18,428.52 : x
  2. Step 2: Convert to fraction form
    20,816.04/28,709.80 = 18,428.52/x
  3. Step 3: Cross multiply
    20,816.04x = 28,709.80 × 18,428.52
  4. Step 4: Simplify right side
    20,816.04x = 529,079,123.50
  5. Step 5: Solve for x
    x = 529,079,123.50/20,816.04
  6. Step 6: Final answer
    x = 25,416.90

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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.