Home / 20,583.89-28,405.59-11,152.43

Finding the Fourth Proportional to 20,583.89, 28,405.59 and 11,152.43

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Solution

The fourth proportional to 20,583.89, 28,405.59 and 11,152.43 is: 15,390.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,583.89 : 28,405.59 = 11,152.43 : x
  2. Step 2: Convert to fraction form
    20,583.89/28,405.59 = 11,152.43/x
  3. Step 3: Cross multiply
    20,583.89x = 28,405.59 × 11,152.43
  4. Step 4: Simplify right side
    20,583.89x = 316,791,354.08
  5. Step 5: Solve for x
    x = 316,791,354.08/20,583.89
  6. Step 6: Final answer
    x = 15,390.26

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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.