Home / 13,121.18-18,107.41-7,152.95

Finding the Fourth Proportional to 13,121.18, 18,107.41 and 7,152.95

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Solution

The fourth proportional to 13,121.18, 18,107.41 and 7,152.95 is: 9,871.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.18 : 18,107.41 = 7,152.95 : x
  2. Step 2: Convert to fraction form
    13,121.18/18,107.41 = 7,152.95/x
  3. Step 3: Cross multiply
    13,121.18x = 18,107.41 × 7,152.95
  4. Step 4: Simplify right side
    13,121.18x = 129,521,307.82
  5. Step 5: Solve for x
    x = 129,521,307.82/13,121.18
  6. Step 6: Final answer
    x = 9,871.16

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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.