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Finding the Fourth Proportional to 18,923.40, 28,385.06 and 10,495.06

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Solution

The fourth proportional to 18,923.40, 28,385.06 and 10,495.06 is: 15,742.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.40 : 28,385.06 = 10,495.06 : x
  2. Step 2: Convert to fraction form
    18,923.40/28,385.06 = 10,495.06/x
  3. Step 3: Cross multiply
    18,923.40x = 28,385.06 × 10,495.06
  4. Step 4: Simplify right side
    18,923.40x = 297,902,784.37
  5. Step 5: Solve for x
    x = 297,902,784.37/18,923.40
  6. Step 6: Final answer
    x = 15,742.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.