Home / 13,486.89-20,232.18-12,666.77

Finding the Fourth Proportional to 13,486.89, 20,232.18 and 12,666.77

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Solution

The fourth proportional to 13,486.89, 20,232.18 and 12,666.77 is: 19,001.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.89 : 20,232.18 = 12,666.77 : x
  2. Step 2: Convert to fraction form
    13,486.89/20,232.18 = 12,666.77/x
  3. Step 3: Cross multiply
    13,486.89x = 20,232.18 × 12,666.77
  4. Step 4: Simplify right side
    13,486.89x = 256,276,269.50
  5. Step 5: Solve for x
    x = 256,276,269.50/13,486.89
  6. Step 6: Final answer
    x = 19,001.88

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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.