Home / 13,405.45-18,500.64-7,437.02

Finding the Fourth Proportional to 13,405.45, 18,500.64 and 7,437.02

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Solution

The fourth proportional to 13,405.45, 18,500.64 and 7,437.02 is: 10,263.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.45 : 18,500.64 = 7,437.02 : x
  2. Step 2: Convert to fraction form
    13,405.45/18,500.64 = 7,437.02/x
  3. Step 3: Cross multiply
    13,405.45x = 18,500.64 × 7,437.02
  4. Step 4: Simplify right side
    13,405.45x = 137,589,537.19
  5. Step 5: Solve for x
    x = 137,589,537.19/13,405.45
  6. Step 6: Final answer
    x = 10,263.70

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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.