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Finding the Fourth Proportional to 18,428.40, 27,642.60 and 17,407.80

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Solution

The fourth proportional to 18,428.40, 27,642.60 and 17,407.80 is: 26,111.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.40 : 27,642.60 = 17,407.80 : x
  2. Step 2: Convert to fraction form
    18,428.40/27,642.60 = 17,407.80/x
  3. Step 3: Cross multiply
    18,428.40x = 27,642.60 × 17,407.80
  4. Step 4: Simplify right side
    18,428.40x = 481,196,852.28
  5. Step 5: Solve for x
    x = 481,196,852.28/18,428.40
  6. Step 6: Final answer
    x = 26,111.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.