Home / 28,534.24-39,321.76-20,561.40

Finding the Fourth Proportional to 28,534.24, 39,321.76 and 20,561.40

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Solution

The fourth proportional to 28,534.24, 39,321.76 and 20,561.40 is: 28,334.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,534.24 : 39,321.76 = 20,561.40 : x
  2. Step 2: Convert to fraction form
    28,534.24/39,321.76 = 20,561.40/x
  3. Step 3: Cross multiply
    28,534.24x = 39,321.76 × 20,561.40
  4. Step 4: Simplify right side
    28,534.24x = 808,510,436.06
  5. Step 5: Solve for x
    x = 808,510,436.06/28,534.24
  6. Step 6: Final answer
    x = 28,334.75

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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.