Home / 20,561.56-28,366.74-13,005.04

Finding the Fourth Proportional to 20,561.56, 28,366.74 and 13,005.04

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Solution

The fourth proportional to 20,561.56, 28,366.74 and 13,005.04 is: 17,941.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.56 : 28,366.74 = 13,005.04 : x
  2. Step 2: Convert to fraction form
    20,561.56/28,366.74 = 13,005.04/x
  3. Step 3: Cross multiply
    20,561.56x = 28,366.74 × 13,005.04
  4. Step 4: Simplify right side
    20,561.56x = 368,910,588.37
  5. Step 5: Solve for x
    x = 368,910,588.37/20,561.56
  6. Step 6: Final answer
    x = 17,941.76

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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.