Home / 20,928.14-28,868.06-12,424.50

Finding the Fourth Proportional to 20,928.14, 28,868.06 and 12,424.50

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Solution

The fourth proportional to 20,928.14, 28,868.06 and 12,424.50 is: 17,138.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.14 : 28,868.06 = 12,424.50 : x
  2. Step 2: Convert to fraction form
    20,928.14/28,868.06 = 12,424.50/x
  3. Step 3: Cross multiply
    20,928.14x = 28,868.06 × 12,424.50
  4. Step 4: Simplify right side
    20,928.14x = 358,671,211.47
  5. Step 5: Solve for x
    x = 358,671,211.47/20,928.14
  6. Step 6: Final answer
    x = 17,138.23

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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.