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Finding the Fourth Proportional to 21,706.87, 32,570.79 and 18,901.03

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Solution

The fourth proportional to 21,706.87, 32,570.79 and 18,901.03 is: 28,360.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,706.87 : 32,570.79 = 18,901.03 : x
  2. Step 2: Convert to fraction form
    21,706.87/32,570.79 = 18,901.03/x
  3. Step 3: Cross multiply
    21,706.87x = 32,570.79 × 18,901.03
  4. Step 4: Simplify right side
    21,706.87x = 615,621,478.91
  5. Step 5: Solve for x
    x = 615,621,478.91/21,706.87
  6. Step 6: Final answer
    x = 28,360.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.