Home / 18,288.50-25,238.14-9,905

Finding the Fourth Proportional to 18,288.50, 25,238.14 and 9,905

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Solution

The fourth proportional to 18,288.50, 25,238.14 and 9,905 is: 13,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,288.50 : 25,238.14 = 9,905 : x
  2. Step 2: Convert to fraction form
    18,288.50/25,238.14 = 9,905/x
  3. Step 3: Cross multiply
    18,288.50x = 25,238.14 × 9,905
  4. Step 4: Simplify right side
    18,288.50x = 249,983,727.18
  5. Step 5: Solve for x
    x = 249,983,727.18/18,288.50
  6. Step 6: Final answer
    x = 13,668.90

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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.