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Finding the Fourth Proportional to 18,763.60, 28,145.40 and 17,688.40

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Solution

The fourth proportional to 18,763.60, 28,145.40 and 17,688.40 is: 26,532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.60 : 28,145.40 = 17,688.40 : x
  2. Step 2: Convert to fraction form
    18,763.60/28,145.40 = 17,688.40/x
  3. Step 3: Cross multiply
    18,763.60x = 28,145.40 × 17,688.40
  4. Step 4: Simplify right side
    18,763.60x = 497,847,093.36
  5. Step 5: Solve for x
    x = 497,847,093.36/18,763.60
  6. Step 6: Final answer
    x = 26,532.60

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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.