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Finding the Fourth Proportional to 21,453.40, 32,160.90 and 8,301.40

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Solution

The fourth proportional to 21,453.40, 32,160.90 and 8,301.40 is: 12,444.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,453.40 : 32,160.90 = 8,301.40 : x
  2. Step 2: Convert to fraction form
    21,453.40/32,160.90 = 8,301.40/x
  3. Step 3: Cross multiply
    21,453.40x = 32,160.90 × 8,301.40
  4. Step 4: Simplify right side
    21,453.40x = 266,980,495.26
  5. Step 5: Solve for x
    x = 266,980,495.26/21,453.40
  6. Step 6: Final answer
    x = 12,444.67

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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.