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Finding the Fourth Proportional to 15,090.44, 20,824.88 and 8,376.16

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Solution

The fourth proportional to 15,090.44, 20,824.88 and 8,376.16 is: 11,559.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.44 : 20,824.88 = 8,376.16 : x
  2. Step 2: Convert to fraction form
    15,090.44/20,824.88 = 8,376.16/x
  3. Step 3: Cross multiply
    15,090.44x = 20,824.88 × 8,376.16
  4. Step 4: Simplify right side
    15,090.44x = 174,432,526.86
  5. Step 5: Solve for x
    x = 174,432,526.86/15,090.44
  6. Step 6: Final answer
    x = 11,559.14

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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.