Home / 13,515.38-18,648.95-7,851.05

Finding the Fourth Proportional to 13,515.38, 18,648.95 and 7,851.05

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Solution

The fourth proportional to 13,515.38, 18,648.95 and 7,851.05 is: 10,833.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.38 : 18,648.95 = 7,851.05 : x
  2. Step 2: Convert to fraction form
    13,515.38/18,648.95 = 7,851.05/x
  3. Step 3: Cross multiply
    13,515.38x = 18,648.95 × 7,851.05
  4. Step 4: Simplify right side
    13,515.38x = 146,413,838.90
  5. Step 5: Solve for x
    x = 146,413,838.90/13,515.38
  6. Step 6: Final answer
    x = 10,833.13

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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.