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Finding the Fourth Proportional to 15,812.56, 21,820.02 and 8,738.98

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Solution

The fourth proportional to 15,812.56, 21,820.02 and 8,738.98 is: 12,059.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.56 : 21,820.02 = 8,738.98 : x
  2. Step 2: Convert to fraction form
    15,812.56/21,820.02 = 8,738.98/x
  3. Step 3: Cross multiply
    15,812.56x = 21,820.02 × 8,738.98
  4. Step 4: Simplify right side
    15,812.56x = 190,684,718.38
  5. Step 5: Solve for x
    x = 190,684,718.38/15,812.56
  6. Step 6: Final answer
    x = 12,059.07

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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.