Home / 20,824.79-31,249.40-7,686.32

Finding the Fourth Proportional to 20,824.79, 31,249.40 and 7,686.32

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Solution

The fourth proportional to 20,824.79, 31,249.40 and 7,686.32 is: 11,533.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.79 : 31,249.40 = 7,686.32 : x
  2. Step 2: Convert to fraction form
    20,824.79/31,249.40 = 7,686.32/x
  3. Step 3: Cross multiply
    20,824.79x = 31,249.40 × 7,686.32
  4. Step 4: Simplify right side
    20,824.79x = 240,192,693.53
  5. Step 5: Solve for x
    x = 240,192,693.53/20,824.79
  6. Step 6: Final answer
    x = 11,533.98

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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.