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Finding the Fourth Proportional to 18,835.20, 26,006.40 and 16,502.40

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Solution

The fourth proportional to 18,835.20, 26,006.40 and 16,502.40 is: 22,785.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,835.20 : 26,006.40 = 16,502.40 : x
  2. Step 2: Convert to fraction form
    18,835.20/26,006.40 = 16,502.40/x
  3. Step 3: Cross multiply
    18,835.20x = 26,006.40 × 16,502.40
  4. Step 4: Simplify right side
    18,835.20x = 429,168,015.36
  5. Step 5: Solve for x
    x = 429,168,015.36/18,835.20
  6. Step 6: Final answer
    x = 22,785.42

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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.