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Finding the Fourth Proportional to 15,905.90, 23,869.65 and 8,885.90

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Solution

The fourth proportional to 15,905.90, 23,869.65 and 8,885.90 is: 13,334.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.90 : 23,869.65 = 8,885.90 : x
  2. Step 2: Convert to fraction form
    15,905.90/23,869.65 = 8,885.90/x
  3. Step 3: Cross multiply
    15,905.90x = 23,869.65 × 8,885.90
  4. Step 4: Simplify right side
    15,905.90x = 212,103,322.94
  5. Step 5: Solve for x
    x = 212,103,322.94/15,905.90
  6. Step 6: Final answer
    x = 13,334.88

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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.