Home / 27,696.16-38,220.48-15,120.90

Finding the Fourth Proportional to 27,696.16, 38,220.48 and 15,120.90

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Solution

The fourth proportional to 27,696.16, 38,220.48 and 15,120.90 is: 20,866.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,696.16 : 38,220.48 = 15,120.90 : x
  2. Step 2: Convert to fraction form
    27,696.16/38,220.48 = 15,120.90/x
  3. Step 3: Cross multiply
    27,696.16x = 38,220.48 × 15,120.90
  4. Step 4: Simplify right side
    27,696.16x = 577,928,056.03
  5. Step 5: Solve for x
    x = 577,928,056.03/27,696.16
  6. Step 6: Final answer
    x = 20,866.72

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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.