Home / 20,430.96-28,196.02-11,357.34

Finding the Fourth Proportional to 20,430.96, 28,196.02 and 11,357.34

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Solution

The fourth proportional to 20,430.96, 28,196.02 and 11,357.34 is: 15,673.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.96 : 28,196.02 = 11,357.34 : x
  2. Step 2: Convert to fraction form
    20,430.96/28,196.02 = 11,357.34/x
  3. Step 3: Cross multiply
    20,430.96x = 28,196.02 × 11,357.34
  4. Step 4: Simplify right side
    20,430.96x = 320,231,785.79
  5. Step 5: Solve for x
    x = 320,231,785.79/20,430.96
  6. Step 6: Final answer
    x = 15,673.85

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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.