Home / 20,771.10-31,156.65-12,476.70

Finding the Fourth Proportional to 20,771.10, 31,156.65 and 12,476.70

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Solution

The fourth proportional to 20,771.10, 31,156.65 and 12,476.70 is: 18,715.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.10 : 31,156.65 = 12,476.70 : x
  2. Step 2: Convert to fraction form
    20,771.10/31,156.65 = 12,476.70/x
  3. Step 3: Cross multiply
    20,771.10x = 31,156.65 × 12,476.70
  4. Step 4: Simplify right side
    20,771.10x = 388,732,175.06
  5. Step 5: Solve for x
    x = 388,732,175.06/20,771.10
  6. Step 6: Final answer
    x = 18,715.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.