Home / 20,943.12-28,901.52-11,511.84

Finding the Fourth Proportional to 20,943.12, 28,901.52 and 11,511.84

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Solution

The fourth proportional to 20,943.12, 28,901.52 and 11,511.84 is: 15,886.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.12 : 28,901.52 = 11,511.84 : x
  2. Step 2: Convert to fraction form
    20,943.12/28,901.52 = 11,511.84/x
  3. Step 3: Cross multiply
    20,943.12x = 28,901.52 × 11,511.84
  4. Step 4: Simplify right side
    20,943.12x = 332,709,674.00
  5. Step 5: Solve for x
    x = 332,709,674.00/20,943.12
  6. Step 6: Final answer
    x = 15,886.35

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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.