Home / 20,928.83-28,886.76-11,981.50

Finding the Fourth Proportional to 20,928.83, 28,886.76 and 11,981.50

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Solution

The fourth proportional to 20,928.83, 28,886.76 and 11,981.50 is: 16,537.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.83 : 28,886.76 = 11,981.50 : x
  2. Step 2: Convert to fraction form
    20,928.83/28,886.76 = 11,981.50/x
  3. Step 3: Cross multiply
    20,928.83x = 28,886.76 × 11,981.50
  4. Step 4: Simplify right side
    20,928.83x = 346,106,642.72
  5. Step 5: Solve for x
    x = 346,106,642.72/20,928.83
  6. Step 6: Final answer
    x = 16,537.32

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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.