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Finding the Fourth Proportional to 18,395, 25,385.19 and 10,011.50

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Solution

The fourth proportional to 18,395, 25,385.19 and 10,011.50 is: 13,815.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,395 : 25,385.19 = 10,011.50 : x
  2. Step 2: Convert to fraction form
    18,395/25,385.19 = 10,011.50/x
  3. Step 3: Cross multiply
    18,395x = 25,385.19 × 10,011.50
  4. Step 4: Simplify right side
    18,395x = 254,143,829.69
  5. Step 5: Solve for x
    x = 254,143,829.69/18,395
  6. Step 6: Final answer
    x = 13,815.92

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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.