Home / 21,328.25-29,433.78-11,898.63

Finding the Fourth Proportional to 21,328.25, 29,433.78 and 11,898.63

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Solution

The fourth proportional to 21,328.25, 29,433.78 and 11,898.63 is: 16,420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.25 : 29,433.78 = 11,898.63 : x
  2. Step 2: Convert to fraction form
    21,328.25/29,433.78 = 11,898.63/x
  3. Step 3: Cross multiply
    21,328.25x = 29,433.78 × 11,898.63
  4. Step 4: Simplify right side
    21,328.25x = 350,221,657.72
  5. Step 5: Solve for x
    x = 350,221,657.72/21,328.25
  6. Step 6: Final answer
    x = 16,420.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.