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Finding the Fourth Proportional to 15,583.76, 21,507.44 and 8,778.01

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Solution

The fourth proportional to 15,583.76, 21,507.44 and 8,778.01 is: 12,114.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,583.76 : 21,507.44 = 8,778.01 : x
  2. Step 2: Convert to fraction form
    15,583.76/21,507.44 = 8,778.01/x
  3. Step 3: Cross multiply
    15,583.76x = 21,507.44 × 8,778.01
  4. Step 4: Simplify right side
    15,583.76x = 188,792,523.39
  5. Step 5: Solve for x
    x = 188,792,523.39/15,583.76
  6. Step 6: Final answer
    x = 12,114.70

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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.