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Finding the Fourth Proportional to 18,902.23, 28,354.71 and 7,809.58

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Solution

The fourth proportional to 18,902.23, 28,354.71 and 7,809.58 is: 11,714.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,902.23 : 28,354.71 = 7,809.58 : x
  2. Step 2: Convert to fraction form
    18,902.23/28,354.71 = 7,809.58/x
  3. Step 3: Cross multiply
    18,902.23x = 28,354.71 × 7,809.58
  4. Step 4: Simplify right side
    18,902.23x = 221,438,376.12
  5. Step 5: Solve for x
    x = 221,438,376.12/18,902.23
  6. Step 6: Final answer
    x = 11,714.93

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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.