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Finding the Fourth Proportional to 18,283.60, 25,231.38 and 9,900.08

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Solution

The fourth proportional to 18,283.60, 25,231.38 and 9,900.08 is: 13,662.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,283.60 : 25,231.38 = 9,900.08 : x
  2. Step 2: Convert to fraction form
    18,283.60/25,231.38 = 9,900.08/x
  3. Step 3: Cross multiply
    18,283.60x = 25,231.38 × 9,900.08
  4. Step 4: Simplify right side
    18,283.60x = 249,792,680.51
  5. Step 5: Solve for x
    x = 249,792,680.51/18,283.60
  6. Step 6: Final answer
    x = 13,662.12

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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.