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Finding the Fourth Proportional to 15,130.89, 20,883.68 and 8,756.60

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Solution

The fourth proportional to 15,130.89, 20,883.68 and 8,756.60 is: 12,085.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.89 : 20,883.68 = 8,756.60 : x
  2. Step 2: Convert to fraction form
    15,130.89/20,883.68 = 8,756.60/x
  3. Step 3: Cross multiply
    15,130.89x = 20,883.68 × 8,756.60
  4. Step 4: Simplify right side
    15,130.89x = 182,869,884.09
  5. Step 5: Solve for x
    x = 182,869,884.09/15,130.89
  6. Step 6: Final answer
    x = 12,085.86

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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.