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Finding the Fourth Proportional to 18,266.78, 25,208.16 and 9,883.28

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Solution

The fourth proportional to 18,266.78, 25,208.16 and 9,883.28 is: 13,638.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,266.78 : 25,208.16 = 9,883.28 : x
  2. Step 2: Convert to fraction form
    18,266.78/25,208.16 = 9,883.28/x
  3. Step 3: Cross multiply
    18,266.78x = 25,208.16 × 9,883.28
  4. Step 4: Simplify right side
    18,266.78x = 249,139,303.56
  5. Step 5: Solve for x
    x = 249,139,303.56/18,266.78
  6. Step 6: Final answer
    x = 13,638.93

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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.