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Finding the Fourth Proportional to 19,417.44, 28,994.55 and 15,423.87

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Solution

The fourth proportional to 19,417.44, 28,994.55 and 15,423.87 is: 23,031.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,417.44 : 28,994.55 = 15,423.87 : x
  2. Step 2: Convert to fraction form
    19,417.44/28,994.55 = 15,423.87/x
  3. Step 3: Cross multiply
    19,417.44x = 28,994.55 × 15,423.87
  4. Step 4: Simplify right side
    19,417.44x = 447,208,169.91
  5. Step 5: Solve for x
    x = 447,208,169.91/19,417.44
  6. Step 6: Final answer
    x = 23,031.26

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.