Home / 15,021.55-20,728.31-8,646.45

Finding the Fourth Proportional to 15,021.55, 20,728.31 and 8,646.45

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Solution

The fourth proportional to 15,021.55, 20,728.31 and 8,646.45 is: 11,931.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.55 : 20,728.31 = 8,646.45 : x
  2. Step 2: Convert to fraction form
    15,021.55/20,728.31 = 8,646.45/x
  3. Step 3: Cross multiply
    15,021.55x = 20,728.31 × 8,646.45
  4. Step 4: Simplify right side
    15,021.55x = 179,226,175.04
  5. Step 5: Solve for x
    x = 179,226,175.04/15,021.55
  6. Step 6: Final answer
    x = 11,931.27

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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.