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Finding the Fourth Proportional to 18,392.64, 25,381.20 and 10,434.72

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Solution

The fourth proportional to 18,392.64, 25,381.20 and 10,434.72 is: 14,399.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,392.64 : 25,381.20 = 10,434.72 : x
  2. Step 2: Convert to fraction form
    18,392.64/25,381.20 = 10,434.72/x
  3. Step 3: Cross multiply
    18,392.64x = 25,381.20 × 10,434.72
  4. Step 4: Simplify right side
    18,392.64x = 264,845,715.26
  5. Step 5: Solve for x
    x = 264,845,715.26/18,392.64
  6. Step 6: Final answer
    x = 14,399.55

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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.