Home / 13,542.96-18,688.32-7,878.60

Finding the Fourth Proportional to 13,542.96, 18,688.32 and 7,878.60

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Solution

The fourth proportional to 13,542.96, 18,688.32 and 7,878.60 is: 10,871.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,542.96 : 18,688.32 = 7,878.60 : x
  2. Step 2: Convert to fraction form
    13,542.96/18,688.32 = 7,878.60/x
  3. Step 3: Cross multiply
    13,542.96x = 18,688.32 × 7,878.60
  4. Step 4: Simplify right side
    13,542.96x = 147,237,797.95
  5. Step 5: Solve for x
    x = 147,237,797.95/13,542.96
  6. Step 6: Final answer
    x = 10,871.91

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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.