Home / 20,220.06-27,886.23-13,143.90

Finding the Fourth Proportional to 20,220.06, 27,886.23 and 13,143.90

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Solution

The fourth proportional to 20,220.06, 27,886.23 and 13,143.90 is: 18,127.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.06 : 27,886.23 = 13,143.90 : x
  2. Step 2: Convert to fraction form
    20,220.06/27,886.23 = 13,143.90/x
  3. Step 3: Cross multiply
    20,220.06x = 27,886.23 × 13,143.90
  4. Step 4: Simplify right side
    20,220.06x = 366,533,818.50
  5. Step 5: Solve for x
    x = 366,533,818.50/20,220.06
  6. Step 6: Final answer
    x = 18,127.24

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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.