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Finding the Fourth Proportional to 14,840.64, 20,478.48 and 8,871.48

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Solution

The fourth proportional to 14,840.64, 20,478.48 and 8,871.48 is: 12,241.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,840.64 : 20,478.48 = 8,871.48 : x
  2. Step 2: Convert to fraction form
    14,840.64/20,478.48 = 8,871.48/x
  3. Step 3: Cross multiply
    14,840.64x = 20,478.48 × 8,871.48
  4. Step 4: Simplify right side
    14,840.64x = 181,674,425.75
  5. Step 5: Solve for x
    x = 181,674,425.75/14,840.64
  6. Step 6: Final answer
    x = 12,241.68

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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.