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Finding the Fourth Proportional to 18,369.14, 25,349.44 and 9,985.64

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Solution

The fourth proportional to 18,369.14, 25,349.44 and 9,985.64 is: 13,780.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,369.14 : 25,349.44 = 9,985.64 : x
  2. Step 2: Convert to fraction form
    18,369.14/25,349.44 = 9,985.64/x
  3. Step 3: Cross multiply
    18,369.14x = 25,349.44 × 9,985.64
  4. Step 4: Simplify right side
    18,369.14x = 253,130,382.04
  5. Step 5: Solve for x
    x = 253,130,382.04/18,369.14
  6. Step 6: Final answer
    x = 13,780.20

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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.