Home / 20,864.99-31,305.18-9,775.28

Finding the Fourth Proportional to 20,864.99, 31,305.18 and 9,775.28

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Solution

The fourth proportional to 20,864.99, 31,305.18 and 9,775.28 is: 14,666.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.99 : 31,305.18 = 9,775.28 : x
  2. Step 2: Convert to fraction form
    20,864.99/31,305.18 = 9,775.28/x
  3. Step 3: Cross multiply
    20,864.99x = 31,305.18 × 9,775.28
  4. Step 4: Simplify right side
    20,864.99x = 306,017,014.87
  5. Step 5: Solve for x
    x = 306,017,014.87/20,864.99
  6. Step 6: Final answer
    x = 14,666.53

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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.