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Finding the Fourth Proportional to 14,885.48, 20,541.12 and 8,915.78

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Solution

The fourth proportional to 14,885.48, 20,541.12 and 8,915.78 is: 12,303.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,885.48 : 20,541.12 = 8,915.78 : x
  2. Step 2: Convert to fraction form
    14,885.48/20,541.12 = 8,915.78/x
  3. Step 3: Cross multiply
    14,885.48x = 20,541.12 × 8,915.78
  4. Step 4: Simplify right side
    14,885.48x = 183,140,106.87
  5. Step 5: Solve for x
    x = 183,140,106.87/14,885.48
  6. Step 6: Final answer
    x = 12,303.27

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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.