Home / 20,615.86-28,448.16-11,661.30

Finding the Fourth Proportional to 20,615.86, 28,448.16 and 11,661.30

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Solution

The fourth proportional to 20,615.86, 28,448.16 and 11,661.30 is: 16,091.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.86 : 28,448.16 = 11,661.30 : x
  2. Step 2: Convert to fraction form
    20,615.86/28,448.16 = 11,661.30/x
  3. Step 3: Cross multiply
    20,615.86x = 28,448.16 × 11,661.30
  4. Step 4: Simplify right side
    20,615.86x = 331,742,528.21
  5. Step 5: Solve for x
    x = 331,742,528.21/20,615.86
  6. Step 6: Final answer
    x = 16,091.62

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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.