Home / 20,486.60-28,269.78-11,533.40

Finding the Fourth Proportional to 20,486.60, 28,269.78 and 11,533.40

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Solution

The fourth proportional to 20,486.60, 28,269.78 and 11,533.40 is: 15,915.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.60 : 28,269.78 = 11,533.40 : x
  2. Step 2: Convert to fraction form
    20,486.60/28,269.78 = 11,533.40/x
  3. Step 3: Cross multiply
    20,486.60x = 28,269.78 × 11,533.40
  4. Step 4: Simplify right side
    20,486.60x = 326,046,680.65
  5. Step 5: Solve for x
    x = 326,046,680.65/20,486.60
  6. Step 6: Final answer
    x = 15,915.12

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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.