Home / 20,486.55-28,270.23-11,533.70

Finding the Fourth Proportional to 20,486.55, 28,270.23 and 11,533.70

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Solution

The fourth proportional to 20,486.55, 28,270.23 and 11,533.70 is: 15,915.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.55 : 28,270.23 = 11,533.70 : x
  2. Step 2: Convert to fraction form
    20,486.55/28,270.23 = 11,533.70/x
  3. Step 3: Cross multiply
    20,486.55x = 28,270.23 × 11,533.70
  4. Step 4: Simplify right side
    20,486.55x = 326,060,210.40
  5. Step 5: Solve for x
    x = 326,060,210.40/20,486.55
  6. Step 6: Final answer
    x = 15,915.82

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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.