Home / 20,520.95-28,318.86-11,089.50

Finding the Fourth Proportional to 20,520.95, 28,318.86 and 11,089.50

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Solution

The fourth proportional to 20,520.95, 28,318.86 and 11,089.50 is: 15,303.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.95 : 28,318.86 = 11,089.50 : x
  2. Step 2: Convert to fraction form
    20,520.95/28,318.86 = 11,089.50/x
  3. Step 3: Cross multiply
    20,520.95x = 28,318.86 × 11,089.50
  4. Step 4: Simplify right side
    20,520.95x = 314,041,997.97
  5. Step 5: Solve for x
    x = 314,041,997.97/20,520.95
  6. Step 6: Final answer
    x = 15,303.49

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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.