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Finding the Fourth Proportional to 19,290.87, 28,889.11 and 17,420.98

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Solution

The fourth proportional to 19,290.87, 28,889.11 and 17,420.98 is: 26,088.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,290.87 : 28,889.11 = 17,420.98 : x
  2. Step 2: Convert to fraction form
    19,290.87/28,889.11 = 17,420.98/x
  3. Step 3: Cross multiply
    19,290.87x = 28,889.11 × 17,420.98
  4. Step 4: Simplify right side
    19,290.87x = 503,276,607.53
  5. Step 5: Solve for x
    x = 503,276,607.53/19,290.87
  6. Step 6: Final answer
    x = 26,088.85

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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.