Home / 15,650.85-21,585.60-13,758.42

Finding the Fourth Proportional to 15,650.85, 21,585.60 and 13,758.42

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Solution

The fourth proportional to 15,650.85, 21,585.60 and 13,758.42 is: 18,975.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,650.85 : 21,585.60 = 13,758.42 : x
  2. Step 2: Convert to fraction form
    15,650.85/21,585.60 = 13,758.42/x
  3. Step 3: Cross multiply
    15,650.85x = 21,585.60 × 13,758.42
  4. Step 4: Simplify right side
    15,650.85x = 296,983,831.70
  5. Step 5: Solve for x
    x = 296,983,831.70/15,650.85
  6. Step 6: Final answer
    x = 18,975.57

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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.