Home / 20,619.60-28,455.69-11,666.91

Finding the Fourth Proportional to 20,619.60, 28,455.69 and 11,666.91

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Solution

The fourth proportional to 20,619.60, 28,455.69 and 11,666.91 is: 16,100.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.60 : 28,455.69 = 11,666.91 : x
  2. Step 2: Convert to fraction form
    20,619.60/28,455.69 = 11,666.91/x
  3. Step 3: Cross multiply
    20,619.60x = 28,455.69 × 11,666.91
  4. Step 4: Simplify right side
    20,619.60x = 331,989,974.22
  5. Step 5: Solve for x
    x = 331,989,974.22/20,619.60
  6. Step 6: Final answer
    x = 16,100.70

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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.