Home / 13,606.20-18,777.29-7,639.74

Finding the Fourth Proportional to 13,606.20, 18,777.29 and 7,639.74

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Solution

The fourth proportional to 13,606.20, 18,777.29 and 7,639.74 is: 10,543.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,606.20 : 18,777.29 = 7,639.74 : x
  2. Step 2: Convert to fraction form
    13,606.20/18,777.29 = 7,639.74/x
  3. Step 3: Cross multiply
    13,606.20x = 18,777.29 × 7,639.74
  4. Step 4: Simplify right side
    13,606.20x = 143,453,575.31
  5. Step 5: Solve for x
    x = 143,453,575.31/13,606.20
  6. Step 6: Final answer
    x = 10,543.25

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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.