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Finding the Fourth Proportional to 28,484.04, 42,719.04 and 12,898.56

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Solution

The fourth proportional to 28,484.04, 42,719.04 and 12,898.56 is: 19,344.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,484.04 : 42,719.04 = 12,898.56 : x
  2. Step 2: Convert to fraction form
    28,484.04/42,719.04 = 12,898.56/x
  3. Step 3: Cross multiply
    28,484.04x = 42,719.04 × 12,898.56
  4. Step 4: Simplify right side
    28,484.04x = 551,014,100.58
  5. Step 5: Solve for x
    x = 551,014,100.58/28,484.04
  6. Step 6: Final answer
    x = 19,344.66

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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.