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Finding the Fourth Proportional to 14,678.94, 20,256.94 and 8,391.45

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Solution

The fourth proportional to 14,678.94, 20,256.94 and 8,391.45 is: 11,580.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,678.94 : 20,256.94 = 8,391.45 : x
  2. Step 2: Convert to fraction form
    14,678.94/20,256.94 = 8,391.45/x
  3. Step 3: Cross multiply
    14,678.94x = 20,256.94 × 8,391.45
  4. Step 4: Simplify right side
    14,678.94x = 169,985,099.16
  5. Step 5: Solve for x
    x = 169,985,099.16/14,678.94
  6. Step 6: Final answer
    x = 11,580.20

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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.