Home / 20,685.21-28,543.08-11,732.28

Finding the Fourth Proportional to 20,685.21, 28,543.08 and 11,732.28

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Solution

The fourth proportional to 20,685.21, 28,543.08 and 11,732.28 is: 16,189.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.21 : 28,543.08 = 11,732.28 : x
  2. Step 2: Convert to fraction form
    20,685.21/28,543.08 = 11,732.28/x
  3. Step 3: Cross multiply
    20,685.21x = 28,543.08 × 11,732.28
  4. Step 4: Simplify right side
    20,685.21x = 334,875,406.62
  5. Step 5: Solve for x
    x = 334,875,406.62/20,685.21
  6. Step 6: Final answer
    x = 16,189.12

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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.