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Finding the Fourth Proportional to 18,539.40, 27,809.20 and 4,688.40

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Solution

The fourth proportional to 18,539.40, 27,809.20 and 4,688.40 is: 7,032.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,539.40 : 27,809.20 = 4,688.40 : x
  2. Step 2: Convert to fraction form
    18,539.40/27,809.20 = 4,688.40/x
  3. Step 3: Cross multiply
    18,539.40x = 27,809.20 × 4,688.40
  4. Step 4: Simplify right side
    18,539.40x = 130,380,653.28
  5. Step 5: Solve for x
    x = 130,380,653.28/18,539.40
  6. Step 6: Final answer
    x = 7,032.63

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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.