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Finding the Fourth Proportional to 18,125.78, 25,011.79 and 14,358.47

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Solution

The fourth proportional to 18,125.78, 25,011.79 and 14,358.47 is: 19,813.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,125.78 : 25,011.79 = 14,358.47 : x
  2. Step 2: Convert to fraction form
    18,125.78/25,011.79 = 14,358.47/x
  3. Step 3: Cross multiply
    18,125.78x = 25,011.79 × 14,358.47
  4. Step 4: Simplify right side
    18,125.78x = 359,130,875.41
  5. Step 5: Solve for x
    x = 359,130,875.41/18,125.78
  6. Step 6: Final answer
    x = 19,813.27

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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.