Home / 28,354.56-39,108.96-20,803.20

Finding the Fourth Proportional to 28,354.56, 39,108.96 and 20,803.20

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Solution

The fourth proportional to 28,354.56, 39,108.96 and 20,803.20 is: 28,693.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,354.56 : 39,108.96 = 20,803.20 : x
  2. Step 2: Convert to fraction form
    28,354.56/39,108.96 = 20,803.20/x
  3. Step 3: Cross multiply
    28,354.56x = 39,108.96 × 20,803.20
  4. Step 4: Simplify right side
    28,354.56x = 813,591,516.67
  5. Step 5: Solve for x
    x = 813,591,516.67/28,354.56
  6. Step 6: Final answer
    x = 28,693.50

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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.