Home / 13,567.79-18,723-7,902.72

Finding the Fourth Proportional to 13,567.79, 18,723 and 7,902.72

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Solution

The fourth proportional to 13,567.79, 18,723 and 7,902.72 is: 10,905.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,567.79 : 18,723 = 7,902.72 : x
  2. Step 2: Convert to fraction form
    13,567.79/18,723 = 7,902.72/x
  3. Step 3: Cross multiply
    13,567.79x = 18,723 × 7,902.72
  4. Step 4: Simplify right side
    13,567.79x = 147,962,532.95
  5. Step 5: Solve for x
    x = 147,962,532.95/13,567.79
  6. Step 6: Final answer
    x = 10,905.43

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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.