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Finding the Fourth Proportional to 20,295.42, 28,130.45 and 19,127.42

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Solution

The fourth proportional to 20,295.42, 28,130.45 and 19,127.42 is: 26,511.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.42 : 28,130.45 = 19,127.42 : x
  2. Step 2: Convert to fraction form
    20,295.42/28,130.45 = 19,127.42/x
  3. Step 3: Cross multiply
    20,295.42x = 28,130.45 × 19,127.42
  4. Step 4: Simplify right side
    20,295.42x = 538,062,695.65
  5. Step 5: Solve for x
    x = 538,062,695.65/20,295.42
  6. Step 6: Final answer
    x = 26,511.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.