Home / 20,585.23-28,408.59-12,087.72

Finding the Fourth Proportional to 20,585.23, 28,408.59 and 12,087.72

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Solution

The fourth proportional to 20,585.23, 28,408.59 and 12,087.72 is: 16,681.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.23 : 28,408.59 = 12,087.72 : x
  2. Step 2: Convert to fraction form
    20,585.23/28,408.59 = 12,087.72/x
  3. Step 3: Cross multiply
    20,585.23x = 28,408.59 × 12,087.72
  4. Step 4: Simplify right side
    20,585.23x = 343,395,081.51
  5. Step 5: Solve for x
    x = 343,395,081.51/20,585.23
  6. Step 6: Final answer
    x = 16,681.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.