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Finding the Fourth Proportional to 18,422.64, 25,457.76 and 15,064.25

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Solution

The fourth proportional to 18,422.64, 25,457.76 and 15,064.25 is: 20,816.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.64 : 25,457.76 = 15,064.25 : x
  2. Step 2: Convert to fraction form
    18,422.64/25,457.76 = 15,064.25/x
  3. Step 3: Cross multiply
    18,422.64x = 25,457.76 × 15,064.25
  4. Step 4: Simplify right side
    18,422.64x = 383,501,933.79
  5. Step 5: Solve for x
    x = 383,501,933.79/18,422.64
  6. Step 6: Final answer
    x = 20,816.88

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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.