Home / 15,019.90-20,728.39-8,646.35

Finding the Fourth Proportional to 15,019.90, 20,728.39 and 8,646.35

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Solution

The fourth proportional to 15,019.90, 20,728.39 and 8,646.35 is: 11,932.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.90 : 20,728.39 = 8,646.35 : x
  2. Step 2: Convert to fraction form
    15,019.90/20,728.39 = 8,646.35/x
  3. Step 3: Cross multiply
    15,019.90x = 20,728.39 × 8,646.35
  4. Step 4: Simplify right side
    15,019.90x = 179,224,805.83
  5. Step 5: Solve for x
    x = 179,224,805.83/15,019.90
  6. Step 6: Final answer
    x = 11,932.49

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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.