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Finding the Fourth Proportional to 19,281.40, 28,907.43 and 13,342.50

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Solution

The fourth proportional to 19,281.40, 28,907.43 and 13,342.50 is: 20,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,281.40 : 28,907.43 = 13,342.50 : x
  2. Step 2: Convert to fraction form
    19,281.40/28,907.43 = 13,342.50/x
  3. Step 3: Cross multiply
    19,281.40x = 28,907.43 × 13,342.50
  4. Step 4: Simplify right side
    19,281.40x = 385,697,384.78
  5. Step 5: Solve for x
    x = 385,697,384.78/19,281.40
  6. Step 6: Final answer
    x = 20,003.60

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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.