Home / 20,615.07-28,439.46-12,654.39

Finding the Fourth Proportional to 20,615.07, 28,439.46 and 12,654.39

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Solution

The fourth proportional to 20,615.07, 28,439.46 and 12,654.39 is: 17,457.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.07 : 28,439.46 = 12,654.39 : x
  2. Step 2: Convert to fraction form
    20,615.07/28,439.46 = 12,654.39/x
  3. Step 3: Cross multiply
    20,615.07x = 28,439.46 × 12,654.39
  4. Step 4: Simplify right side
    20,615.07x = 359,884,018.23
  5. Step 5: Solve for x
    x = 359,884,018.23/20,615.07
  6. Step 6: Final answer
    x = 17,457.33

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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.