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Finding the Fourth Proportional to 15,510, 21,403.80 and 8,795.76

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Solution

The fourth proportional to 15,510, 21,403.80 and 8,795.76 is: 12,138.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,510 : 21,403.80 = 8,795.76 : x
  2. Step 2: Convert to fraction form
    15,510/21,403.80 = 8,795.76/x
  3. Step 3: Cross multiply
    15,510x = 21,403.80 × 8,795.76
  4. Step 4: Simplify right side
    15,510x = 188,262,687.89
  5. Step 5: Solve for x
    x = 188,262,687.89/15,510
  6. Step 6: Final answer
    x = 12,138.15

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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.