Home / 20,969.52-28,935.36-12,471.84

Finding the Fourth Proportional to 20,969.52, 28,935.36 and 12,471.84

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Solution

The fourth proportional to 20,969.52, 28,935.36 and 12,471.84 is: 17,209.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.52 : 28,935.36 = 12,471.84 : x
  2. Step 2: Convert to fraction form
    20,969.52/28,935.36 = 12,471.84/x
  3. Step 3: Cross multiply
    20,969.52x = 28,935.36 × 12,471.84
  4. Step 4: Simplify right side
    20,969.52x = 360,877,180.26
  5. Step 5: Solve for x
    x = 360,877,180.26/20,969.52
  6. Step 6: Final answer
    x = 17,209.61

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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.