Home / 20,430.50-28,194.46-11,356.71

Finding the Fourth Proportional to 20,430.50, 28,194.46 and 11,356.71

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Solution

The fourth proportional to 20,430.50, 28,194.46 and 11,356.71 is: 15,672.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.50 : 28,194.46 = 11,356.71 : x
  2. Step 2: Convert to fraction form
    20,430.50/28,194.46 = 11,356.71/x
  3. Step 3: Cross multiply
    20,430.50x = 28,194.46 × 11,356.71
  4. Step 4: Simplify right side
    20,430.50x = 320,196,305.83
  5. Step 5: Solve for x
    x = 320,196,305.83/20,430.50
  6. Step 6: Final answer
    x = 15,672.47

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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.