Home / 13,407.54-18,510.80-8,635.78

Finding the Fourth Proportional to 13,407.54, 18,510.80 and 8,635.78

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Solution

The fourth proportional to 13,407.54, 18,510.80 and 8,635.78 is: 11,922.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,407.54 : 18,510.80 = 8,635.78 : x
  2. Step 2: Convert to fraction form
    13,407.54/18,510.80 = 8,635.78/x
  3. Step 3: Cross multiply
    13,407.54x = 18,510.80 × 8,635.78
  4. Step 4: Simplify right side
    13,407.54x = 159,855,196.42
  5. Step 5: Solve for x
    x = 159,855,196.42/13,407.54
  6. Step 6: Final answer
    x = 11,922.78

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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.