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Finding the Fourth Proportional to 14,915.56, 20,581.86 and 9,325.48

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Solution

The fourth proportional to 14,915.56, 20,581.86 and 9,325.48 is: 12,868.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,915.56 : 20,581.86 = 9,325.48 : x
  2. Step 2: Convert to fraction form
    14,915.56/20,581.86 = 9,325.48/x
  3. Step 3: Cross multiply
    14,915.56x = 20,581.86 × 9,325.48
  4. Step 4: Simplify right side
    14,915.56x = 191,935,723.79
  5. Step 5: Solve for x
    x = 191,935,723.79/14,915.56
  6. Step 6: Final answer
    x = 12,868.15

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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.