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Finding the Fourth Proportional to 13,901.76, 20,866.68 and 12,330.77

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Solution

The fourth proportional to 13,901.76, 20,866.68 and 12,330.77 is: 18,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,901.76 : 20,866.68 = 12,330.77 : x
  2. Step 2: Convert to fraction form
    13,901.76/20,866.68 = 12,330.77/x
  3. Step 3: Cross multiply
    13,901.76x = 20,866.68 × 12,330.77
  4. Step 4: Simplify right side
    13,901.76x = 257,302,127.41
  5. Step 5: Solve for x
    x = 257,302,127.41/13,901.76
  6. Step 6: Final answer
    x = 18,508.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.