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Finding the Fourth Proportional to 18,275.49, 25,220.19 and 9,891.99

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Solution

The fourth proportional to 18,275.49, 25,220.19 and 9,891.99 is: 13,650.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,275.49 : 25,220.19 = 9,891.99 : x
  2. Step 2: Convert to fraction form
    18,275.49/25,220.19 = 9,891.99/x
  3. Step 3: Cross multiply
    18,275.49x = 25,220.19 × 9,891.99
  4. Step 4: Simplify right side
    18,275.49x = 249,477,904.37
  5. Step 5: Solve for x
    x = 249,477,904.37/18,275.49
  6. Step 6: Final answer
    x = 13,650.96

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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.