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Finding the Fourth Proportional to 14,851.94, 20,489.95 and 8,478.89

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Solution

The fourth proportional to 14,851.94, 20,489.95 and 8,478.89 is: 11,697.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,851.94 : 20,489.95 = 8,478.89 : x
  2. Step 2: Convert to fraction form
    14,851.94/20,489.95 = 8,478.89/x
  3. Step 3: Cross multiply
    14,851.94x = 20,489.95 × 8,478.89
  4. Step 4: Simplify right side
    14,851.94x = 173,732,032.16
  5. Step 5: Solve for x
    x = 173,732,032.16/14,851.94
  6. Step 6: Final answer
    x = 11,697.60

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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.