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Finding the Fourth Proportional to 28,287.01, 42,448.40 and 15,815.22

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Solution

The fourth proportional to 28,287.01, 42,448.40 and 15,815.22 is: 23,732.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,287.01 : 42,448.40 = 15,815.22 : x
  2. Step 2: Convert to fraction form
    28,287.01/42,448.40 = 15,815.22/x
  3. Step 3: Cross multiply
    28,287.01x = 42,448.40 × 15,815.22
  4. Step 4: Simplify right side
    28,287.01x = 671,330,784.65
  5. Step 5: Solve for x
    x = 671,330,784.65/28,287.01
  6. Step 6: Final answer
    x = 23,732.83

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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.