Home / 13,155.84-18,156.32-7,188.42

Finding the Fourth Proportional to 13,155.84, 18,156.32 and 7,188.42

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Solution

The fourth proportional to 13,155.84, 18,156.32 and 7,188.42 is: 9,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.84 : 18,156.32 = 7,188.42 : x
  2. Step 2: Convert to fraction form
    13,155.84/18,156.32 = 7,188.42/x
  3. Step 3: Cross multiply
    13,155.84x = 18,156.32 × 7,188.42
  4. Step 4: Simplify right side
    13,155.84x = 130,515,149.79
  5. Step 5: Solve for x
    x = 130,515,149.79/13,155.84
  6. Step 6: Final answer
    x = 9,920.70

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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.