Home / 13,610.15-18,780.60-7,641.77

Finding the Fourth Proportional to 13,610.15, 18,780.60 and 7,641.77

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Solution

The fourth proportional to 13,610.15, 18,780.60 and 7,641.77 is: 10,544.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,610.15 : 18,780.60 = 7,641.77 : x
  2. Step 2: Convert to fraction form
    13,610.15/18,780.60 = 7,641.77/x
  3. Step 3: Cross multiply
    13,610.15x = 18,780.60 × 7,641.77
  4. Step 4: Simplify right side
    13,610.15x = 143,516,931.76
  5. Step 5: Solve for x
    x = 143,516,931.76/13,610.15
  6. Step 6: Final answer
    x = 10,544.85

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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.