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Finding the Fourth Proportional to 20,751.84, 30,977.19 and 19,210.14

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Solution

The fourth proportional to 20,751.84, 30,977.19 and 19,210.14 is: 28,675.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.84 : 30,977.19 = 19,210.14 : x
  2. Step 2: Convert to fraction form
    20,751.84/30,977.19 = 19,210.14/x
  3. Step 3: Cross multiply
    20,751.84x = 30,977.19 × 19,210.14
  4. Step 4: Simplify right side
    20,751.84x = 595,076,156.71
  5. Step 5: Solve for x
    x = 595,076,156.71/20,751.84
  6. Step 6: Final answer
    x = 28,675.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.