Home / 13,586.40-20,360.16-12,886.56

Finding the Fourth Proportional to 13,586.40, 20,360.16 and 12,886.56

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Solution

The fourth proportional to 13,586.40, 20,360.16 and 12,886.56 is: 19,311.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,586.40 : 20,360.16 = 12,886.56 : x
  2. Step 2: Convert to fraction form
    13,586.40/20,360.16 = 12,886.56/x
  3. Step 3: Cross multiply
    13,586.40x = 20,360.16 × 12,886.56
  4. Step 4: Simplify right side
    13,586.40x = 262,372,423.45
  5. Step 5: Solve for x
    x = 262,372,423.45/13,586.40
  6. Step 6: Final answer
    x = 19,311.40

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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.