Home / 28,071.36-42,129.04-19,582.65

Finding the Fourth Proportional to 28,071.36, 42,129.04 and 19,582.65

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Solution

The fourth proportional to 28,071.36, 42,129.04 and 19,582.65 is: 29,389.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,071.36 : 42,129.04 = 19,582.65 : x
  2. Step 2: Convert to fraction form
    28,071.36/42,129.04 = 19,582.65/x
  3. Step 3: Cross multiply
    28,071.36x = 42,129.04 × 19,582.65
  4. Step 4: Simplify right side
    28,071.36x = 824,998,245.16
  5. Step 5: Solve for x
    x = 824,998,245.16/28,071.36
  6. Step 6: Final answer
    x = 29,389.32

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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.