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Finding the Fourth Proportional to 14,295.90, 21,456.90 and 7,280.76

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Solution

The fourth proportional to 14,295.90, 21,456.90 and 7,280.76 is: 10,927.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,295.90 : 21,456.90 = 7,280.76 : x
  2. Step 2: Convert to fraction form
    14,295.90/21,456.90 = 7,280.76/x
  3. Step 3: Cross multiply
    14,295.90x = 21,456.90 × 7,280.76
  4. Step 4: Simplify right side
    14,295.90x = 156,222,539.24
  5. Step 5: Solve for x
    x = 156,222,539.24/14,295.90
  6. Step 6: Final answer
    x = 10,927.79

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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.