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Finding the Fourth Proportional to 15,017.76, 20,719.44 and 8,724.96

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Solution

The fourth proportional to 15,017.76, 20,719.44 and 8,724.96 is: 12,037.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,017.76 : 20,719.44 = 8,724.96 : x
  2. Step 2: Convert to fraction form
    15,017.76/20,719.44 = 8,724.96/x
  3. Step 3: Cross multiply
    15,017.76x = 20,719.44 × 8,724.96
  4. Step 4: Simplify right side
    15,017.76x = 180,776,285.22
  5. Step 5: Solve for x
    x = 180,776,285.22/15,017.76
  6. Step 6: Final answer
    x = 12,037.50

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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.