Home / 15,077.07-20,802.15-11,880.45

Finding the Fourth Proportional to 15,077.07, 20,802.15 and 11,880.45

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Solution

The fourth proportional to 15,077.07, 20,802.15 and 11,880.45 is: 16,391.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,077.07 : 20,802.15 = 11,880.45 : x
  2. Step 2: Convert to fraction form
    15,077.07/20,802.15 = 11,880.45/x
  3. Step 3: Cross multiply
    15,077.07x = 20,802.15 × 11,880.45
  4. Step 4: Simplify right side
    15,077.07x = 247,138,902.97
  5. Step 5: Solve for x
    x = 247,138,902.97/15,077.07
  6. Step 6: Final answer
    x = 16,391.71

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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.