Home / 20,901.36-28,838.52-12,511.92

Finding the Fourth Proportional to 20,901.36, 28,838.52 and 12,511.92

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Solution

The fourth proportional to 20,901.36, 28,838.52 and 12,511.92 is: 17,263.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.36 : 28,838.52 = 12,511.92 : x
  2. Step 2: Convert to fraction form
    20,901.36/28,838.52 = 12,511.92/x
  3. Step 3: Cross multiply
    20,901.36x = 28,838.52 × 12,511.92
  4. Step 4: Simplify right side
    20,901.36x = 360,825,255.16
  5. Step 5: Solve for x
    x = 360,825,255.16/20,901.36
  6. Step 6: Final answer
    x = 17,263.24

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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.