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Finding the Fourth Proportional to 18,314.78, 25,274.55 and 9,931.28

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Solution

The fourth proportional to 18,314.78, 25,274.55 and 9,931.28 is: 13,705.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,314.78 : 25,274.55 = 9,931.28 : x
  2. Step 2: Convert to fraction form
    18,314.78/25,274.55 = 9,931.28/x
  3. Step 3: Cross multiply
    18,314.78x = 25,274.55 × 9,931.28
  4. Step 4: Simplify right side
    18,314.78x = 251,008,506.55
  5. Step 5: Solve for x
    x = 251,008,506.55/18,314.78
  6. Step 6: Final answer
    x = 13,705.25

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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.