Home / 20,485.48-28,269.28-11,531.76

Finding the Fourth Proportional to 20,485.48, 28,269.28 and 11,531.76

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Solution

The fourth proportional to 20,485.48, 28,269.28 and 11,531.76 is: 15,913.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.48 : 28,269.28 = 11,531.76 : x
  2. Step 2: Convert to fraction form
    20,485.48/28,269.28 = 11,531.76/x
  3. Step 3: Cross multiply
    20,485.48x = 28,269.28 × 11,531.76
  4. Step 4: Simplify right side
    20,485.48x = 325,994,552.33
  5. Step 5: Solve for x
    x = 325,994,552.33/20,485.48
  6. Step 6: Final answer
    x = 15,913.44

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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.