Home / 15,648.42-21,587.59-13,857.73

Finding the Fourth Proportional to 15,648.42, 21,587.59 and 13,857.73

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Solution

The fourth proportional to 15,648.42, 21,587.59 and 13,857.73 is: 19,117.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,648.42 : 21,587.59 = 13,857.73 : x
  2. Step 2: Convert to fraction form
    15,648.42/21,587.59 = 13,857.73/x
  3. Step 3: Cross multiply
    15,648.42x = 21,587.59 × 13,857.73
  4. Step 4: Simplify right side
    15,648.42x = 299,154,993.57
  5. Step 5: Solve for x
    x = 299,154,993.57/15,648.42
  6. Step 6: Final answer
    x = 19,117.27

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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.