Home / 13,505.18-20,159.10-12,529.53

Finding the Fourth Proportional to 13,505.18, 20,159.10 and 12,529.53

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Solution

The fourth proportional to 13,505.18, 20,159.10 and 12,529.53 is: 18,702.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,505.18 : 20,159.10 = 12,529.53 : x
  2. Step 2: Convert to fraction form
    13,505.18/20,159.10 = 12,529.53/x
  3. Step 3: Cross multiply
    13,505.18x = 20,159.10 × 12,529.53
  4. Step 4: Simplify right side
    13,505.18x = 252,584,048.22
  5. Step 5: Solve for x
    x = 252,584,048.22/13,505.18
  6. Step 6: Final answer
    x = 18,702.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.