Home / 20,485.13-28,270.02-11,532.96

Finding the Fourth Proportional to 20,485.13, 28,270.02 and 11,532.96

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Solution

The fourth proportional to 20,485.13, 28,270.02 and 11,532.96 is: 15,915.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.13 : 28,270.02 = 11,532.96 : x
  2. Step 2: Convert to fraction form
    20,485.13/28,270.02 = 11,532.96/x
  3. Step 3: Cross multiply
    20,485.13x = 28,270.02 × 11,532.96
  4. Step 4: Simplify right side
    20,485.13x = 326,037,009.86
  5. Step 5: Solve for x
    x = 326,037,009.86/20,485.13
  6. Step 6: Final answer
    x = 15,915.79

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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.