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Finding the Fourth Proportional to 18,420.27, 25,420.02 and 10,036.77

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Solution

The fourth proportional to 18,420.27, 25,420.02 and 10,036.77 is: 13,850.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.27 : 25,420.02 = 10,036.77 : x
  2. Step 2: Convert to fraction form
    18,420.27/25,420.02 = 10,036.77/x
  3. Step 3: Cross multiply
    18,420.27x = 25,420.02 × 10,036.77
  4. Step 4: Simplify right side
    18,420.27x = 255,134,894.14
  5. Step 5: Solve for x
    x = 255,134,894.14/18,420.27
  6. Step 6: Final answer
    x = 13,850.77

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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.