Home / 20,320.56-28,050.12-13,248.72

Finding the Fourth Proportional to 20,320.56, 28,050.12 and 13,248.72

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Solution

The fourth proportional to 20,320.56, 28,050.12 and 13,248.72 is: 18,288.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.56 : 28,050.12 = 13,248.72 : x
  2. Step 2: Convert to fraction form
    20,320.56/28,050.12 = 13,248.72/x
  3. Step 3: Cross multiply
    20,320.56x = 28,050.12 × 13,248.72
  4. Step 4: Simplify right side
    20,320.56x = 371,628,185.85
  5. Step 5: Solve for x
    x = 371,628,185.85/20,320.56
  6. Step 6: Final answer
    x = 18,288.28

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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.