Home / 20,888.64-28,828.14-11,459.04

Finding the Fourth Proportional to 20,888.64, 28,828.14 and 11,459.04

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Solution

The fourth proportional to 20,888.64, 28,828.14 and 11,459.04 is: 15,814.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.64 : 28,828.14 = 11,459.04 : x
  2. Step 2: Convert to fraction form
    20,888.64/28,828.14 = 11,459.04/x
  3. Step 3: Cross multiply
    20,888.64x = 28,828.14 × 11,459.04
  4. Step 4: Simplify right side
    20,888.64x = 330,342,809.39
  5. Step 5: Solve for x
    x = 330,342,809.39/20,888.64
  6. Step 6: Final answer
    x = 15,814.47

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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.