Home / 20,905.50-31,472.30-19,068.42

Finding the Fourth Proportional to 20,905.50, 31,472.30 and 19,068.42

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Solution

The fourth proportional to 20,905.50, 31,472.30 and 19,068.42 is: 28,706.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.50 : 31,472.30 = 19,068.42 : x
  2. Step 2: Convert to fraction form
    20,905.50/31,472.30 = 19,068.42/x
  3. Step 3: Cross multiply
    20,905.50x = 31,472.30 × 19,068.42
  4. Step 4: Simplify right side
    20,905.50x = 600,127,034.77
  5. Step 5: Solve for x
    x = 600,127,034.77/20,905.50
  6. Step 6: Final answer
    x = 28,706.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.