Home / 20,887.34-28,824.62-11,455.88

Finding the Fourth Proportional to 20,887.34, 28,824.62 and 11,455.88

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Solution

The fourth proportional to 20,887.34, 28,824.62 and 11,455.88 is: 15,809.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.34 : 28,824.62 = 11,455.88 : x
  2. Step 2: Convert to fraction form
    20,887.34/28,824.62 = 11,455.88/x
  3. Step 3: Cross multiply
    20,887.34x = 28,824.62 × 11,455.88
  4. Step 4: Simplify right side
    20,887.34x = 330,211,186.36
  5. Step 5: Solve for x
    x = 330,211,186.36/20,887.34
  6. Step 6: Final answer
    x = 15,809.16

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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.