Home / 20,870.73-31,293.34-9,780.82

Finding the Fourth Proportional to 20,870.73, 31,293.34 and 9,780.82

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Solution

The fourth proportional to 20,870.73, 31,293.34 and 9,780.82 is: 14,665.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.73 : 31,293.34 = 9,780.82 : x
  2. Step 2: Convert to fraction form
    20,870.73/31,293.34 = 9,780.82/x
  3. Step 3: Cross multiply
    20,870.73x = 31,293.34 × 9,780.82
  4. Step 4: Simplify right side
    20,870.73x = 306,074,423.05
  5. Step 5: Solve for x
    x = 306,074,423.05/20,870.73
  6. Step 6: Final answer
    x = 14,665.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.