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Finding the Fourth Proportional to 8,688.60, 13,032.90 and 7,684.20

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Solution

The fourth proportional to 8,688.60, 13,032.90 and 7,684.20 is: 11,526.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.60 : 13,032.90 = 7,684.20 : x
  2. Step 2: Convert to fraction form
    8,688.60/13,032.90 = 7,684.20/x
  3. Step 3: Cross multiply
    8,688.60x = 13,032.90 × 7,684.20
  4. Step 4: Simplify right side
    8,688.60x = 100,147,410.18
  5. Step 5: Solve for x
    x = 100,147,410.18/8,688.60
  6. Step 6: Final answer
    x = 11,526.30

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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.