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Finding the Fourth Proportional to 13,392.10, 18,482.19 and 7,425.64

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Solution

The fourth proportional to 13,392.10, 18,482.19 and 7,425.64 is: 10,247.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.10 : 18,482.19 = 7,425.64 : x
  2. Step 2: Convert to fraction form
    13,392.10/18,482.19 = 7,425.64/x
  3. Step 3: Cross multiply
    13,392.10x = 18,482.19 × 7,425.64
  4. Step 4: Simplify right side
    13,392.10x = 137,242,089.35
  5. Step 5: Solve for x
    x = 137,242,089.35/13,392.10
  6. Step 6: Final answer
    x = 10,247.99

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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.