Home / 13,629.60-18,810.84-7,661.76

Finding the Fourth Proportional to 13,629.60, 18,810.84 and 7,661.76

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Solution

The fourth proportional to 13,629.60, 18,810.84 and 7,661.76 is: 10,574.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.60 : 18,810.84 = 7,661.76 : x
  2. Step 2: Convert to fraction form
    13,629.60/18,810.84 = 7,661.76/x
  3. Step 3: Cross multiply
    13,629.60x = 18,810.84 × 7,661.76
  4. Step 4: Simplify right side
    13,629.60x = 144,124,141.48
  5. Step 5: Solve for x
    x = 144,124,141.48/13,629.60
  6. Step 6: Final answer
    x = 10,574.35

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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.