Home / 20,483.28-28,275.64-13,772.80

Finding the Fourth Proportional to 20,483.28, 28,275.64 and 13,772.80

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Solution

The fourth proportional to 20,483.28, 28,275.64 and 13,772.80 is: 19,012.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.28 : 28,275.64 = 13,772.80 : x
  2. Step 2: Convert to fraction form
    20,483.28/28,275.64 = 13,772.80/x
  3. Step 3: Cross multiply
    20,483.28x = 28,275.64 × 13,772.80
  4. Step 4: Simplify right side
    20,483.28x = 389,434,734.59
  5. Step 5: Solve for x
    x = 389,434,734.59/20,483.28
  6. Step 6: Final answer
    x = 19,012.32

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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.