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Finding the Fourth Proportional to 19,271.71, 28,907.52 and 5,420.71

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Solution

The fourth proportional to 19,271.71, 28,907.52 and 5,420.71 is: 8,131.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,271.71 : 28,907.52 = 5,420.71 : x
  2. Step 2: Convert to fraction form
    19,271.71/28,907.52 = 5,420.71/x
  3. Step 3: Cross multiply
    19,271.71x = 28,907.52 × 5,420.71
  4. Step 4: Simplify right side
    19,271.71x = 156,699,282.74
  5. Step 5: Solve for x
    x = 156,699,282.74/19,271.71
  6. Step 6: Final answer
    x = 8,131.05

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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.