Home / 20,925.47-31,388.36-7,777.85

Finding the Fourth Proportional to 20,925.47, 31,388.36 and 7,777.85

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Solution

The fourth proportional to 20,925.47, 31,388.36 and 7,777.85 is: 11,666.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.47 : 31,388.36 = 7,777.85 : x
  2. Step 2: Convert to fraction form
    20,925.47/31,388.36 = 7,777.85/x
  3. Step 3: Cross multiply
    20,925.47x = 31,388.36 × 7,777.85
  4. Step 4: Simplify right side
    20,925.47x = 244,133,759.99
  5. Step 5: Solve for x
    x = 244,133,759.99/20,925.47
  6. Step 6: Final answer
    x = 11,666.82

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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.