Home / 20,360.16-28,100.52-11,978.28

Finding the Fourth Proportional to 20,360.16, 28,100.52 and 11,978.28

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Solution

The fourth proportional to 20,360.16, 28,100.52 and 11,978.28 is: 16,532.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,360.16 : 28,100.52 = 11,978.28 : x
  2. Step 2: Convert to fraction form
    20,360.16/28,100.52 = 11,978.28/x
  3. Step 3: Cross multiply
    20,360.16x = 28,100.52 × 11,978.28
  4. Step 4: Simplify right side
    20,360.16x = 336,595,896.71
  5. Step 5: Solve for x
    x = 336,595,896.71/20,360.16
  6. Step 6: Final answer
    x = 16,532.09

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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.