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Finding the Fourth Proportional to 18,638.05, 25,710.71 and 11,079.00

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Solution

The fourth proportional to 18,638.05, 25,710.71 and 11,079.00 is: 15,283.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.05 : 25,710.71 = 11,079.00 : x
  2. Step 2: Convert to fraction form
    18,638.05/25,710.71 = 11,079.00/x
  3. Step 3: Cross multiply
    18,638.05x = 25,710.71 × 11,079.00
  4. Step 4: Simplify right side
    18,638.05x = 284,849,010.96
  5. Step 5: Solve for x
    x = 284,849,010.96/18,638.05
  6. Step 6: Final answer
    x = 15,283.20

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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.