Home / 28,156.20-38,864.37-21,795.67

Finding the Fourth Proportional to 28,156.20, 38,864.37 and 21,795.67

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Solution

The fourth proportional to 28,156.20, 38,864.37 and 21,795.67 is: 30,084.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.20 : 38,864.37 = 21,795.67 : x
  2. Step 2: Convert to fraction form
    28,156.20/38,864.37 = 21,795.67/x
  3. Step 3: Cross multiply
    28,156.20x = 38,864.37 × 21,795.67
  4. Step 4: Simplify right side
    28,156.20x = 847,074,983.28
  5. Step 5: Solve for x
    x = 847,074,983.28/28,156.20
  6. Step 6: Final answer
    x = 30,084.85

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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.