Home / 20,640.07-28,483.14-11,208.70

Finding the Fourth Proportional to 20,640.07, 28,483.14 and 11,208.70

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Solution

The fourth proportional to 20,640.07, 28,483.14 and 11,208.70 is: 15,467.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.07 : 28,483.14 = 11,208.70 : x
  2. Step 2: Convert to fraction form
    20,640.07/28,483.14 = 11,208.70/x
  3. Step 3: Cross multiply
    20,640.07x = 28,483.14 × 11,208.70
  4. Step 4: Simplify right side
    20,640.07x = 319,258,971.32
  5. Step 5: Solve for x
    x = 319,258,971.32/20,640.07
  6. Step 6: Final answer
    x = 15,467.92

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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.