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Finding the Fourth Proportional to 14,885.16, 20,541.86 and 8,424.28

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Solution

The fourth proportional to 14,885.16, 20,541.86 and 8,424.28 is: 11,625.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,885.16 : 20,541.86 = 8,424.28 : x
  2. Step 2: Convert to fraction form
    14,885.16/20,541.86 = 8,424.28/x
  3. Step 3: Cross multiply
    14,885.16x = 20,541.86 × 8,424.28
  4. Step 4: Simplify right side
    14,885.16x = 173,050,380.36
  5. Step 5: Solve for x
    x = 173,050,380.36/14,885.16
  6. Step 6: Final answer
    x = 11,625.70

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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.