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Finding the Fourth Proportional to 8,688.30, 13,008.15 and 8,688.30

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Solution

The fourth proportional to 8,688.30, 13,008.15 and 8,688.30 is: 13,008.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.30 : 13,008.15 = 8,688.30 : x
  2. Step 2: Convert to fraction form
    8,688.30/13,008.15 = 8,688.30/x
  3. Step 3: Cross multiply
    8,688.30x = 13,008.15 × 8,688.30
  4. Step 4: Simplify right side
    8,688.30x = 113,018,709.65
  5. Step 5: Solve for x
    x = 113,018,709.65/8,688.30
  6. Step 6: Final answer
    x = 13,008.15

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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.