Home / 27,620.56-38,130.79-21,557.77

Finding the Fourth Proportional to 27,620.56, 38,130.79 and 21,557.77

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Solution

The fourth proportional to 27,620.56, 38,130.79 and 21,557.77 is: 29,760.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,620.56 : 38,130.79 = 21,557.77 : x
  2. Step 2: Convert to fraction form
    27,620.56/38,130.79 = 21,557.77/x
  3. Step 3: Cross multiply
    27,620.56x = 38,130.79 × 21,557.77
  4. Step 4: Simplify right side
    27,620.56x = 822,014,800.74
  5. Step 5: Solve for x
    x = 822,014,800.74/27,620.56
  6. Step 6: Final answer
    x = 29,760.98

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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.