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Finding the Fourth Proportional to 18,315.60, 27,407.64 and 15,858.80

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Solution

The fourth proportional to 18,315.60, 27,407.64 and 15,858.80 is: 23,731.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,315.60 : 27,407.64 = 15,858.80 : x
  2. Step 2: Convert to fraction form
    18,315.60/27,407.64 = 15,858.80/x
  3. Step 3: Cross multiply
    18,315.60x = 27,407.64 × 15,858.80
  4. Step 4: Simplify right side
    18,315.60x = 434,652,281.23
  5. Step 5: Solve for x
    x = 434,652,281.23/18,315.60
  6. Step 6: Final answer
    x = 23,731.26

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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.