Home / 13,607.55-18,778.40-7,639.23

Finding the Fourth Proportional to 13,607.55, 18,778.40 and 7,639.23

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Solution

The fourth proportional to 13,607.55, 18,778.40 and 7,639.23 is: 10,542.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.55 : 18,778.40 = 7,639.23 : x
  2. Step 2: Convert to fraction form
    13,607.55/18,778.40 = 7,639.23/x
  3. Step 3: Cross multiply
    13,607.55x = 18,778.40 × 7,639.23
  4. Step 4: Simplify right side
    13,607.55x = 143,452,443.83
  5. Step 5: Solve for x
    x = 143,452,443.83/13,607.55
  6. Step 6: Final answer
    x = 10,542.12

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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.