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Finding the Fourth Proportional to 13,157.68, 18,156.36 and 8,900.08

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Solution

The fourth proportional to 13,157.68, 18,156.36 and 8,900.08 is: 12,281.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.68 : 18,156.36 = 8,900.08 : x
  2. Step 2: Convert to fraction form
    13,157.68/18,156.36 = 8,900.08/x
  3. Step 3: Cross multiply
    13,157.68x = 18,156.36 × 8,900.08
  4. Step 4: Simplify right side
    13,157.68x = 161,593,056.51
  5. Step 5: Solve for x
    x = 161,593,056.51/13,157.68
  6. Step 6: Final answer
    x = 12,281.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.