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Finding the Fourth Proportional to 13,485.68, 20,239.11 and 9,354.76

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Solution

The fourth proportional to 13,485.68, 20,239.11 and 9,354.76 is: 14,039.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.68 : 20,239.11 = 9,354.76 : x
  2. Step 2: Convert to fraction form
    13,485.68/20,239.11 = 9,354.76/x
  3. Step 3: Cross multiply
    13,485.68x = 20,239.11 × 9,354.76
  4. Step 4: Simplify right side
    13,485.68x = 189,331,966.07
  5. Step 5: Solve for x
    x = 189,331,966.07/13,485.68
  6. Step 6: Final answer
    x = 14,039.48

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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.