Home / 28,089.23-42,128.91-12,291.26

Finding the Fourth Proportional to 28,089.23, 42,128.91 and 12,291.26

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Solution

The fourth proportional to 28,089.23, 42,128.91 and 12,291.26 is: 18,434.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,089.23 : 42,128.91 = 12,291.26 : x
  2. Step 2: Convert to fraction form
    28,089.23/42,128.91 = 12,291.26/x
  3. Step 3: Cross multiply
    28,089.23x = 42,128.91 × 12,291.26
  4. Step 4: Simplify right side
    28,089.23x = 517,817,175.68
  5. Step 5: Solve for x
    x = 517,817,175.68/28,089.23
  6. Step 6: Final answer
    x = 18,434.73

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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.