Home / 39,915.10-59,872.64-13,619.84

Finding the Fourth Proportional to 39,915.10, 59,872.64 and 13,619.84

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Solution

The fourth proportional to 39,915.10, 59,872.64 and 13,619.84 is: 20,429.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,915.10 : 59,872.64 = 13,619.84 : x
  2. Step 2: Convert to fraction form
    39,915.10/59,872.64 = 13,619.84/x
  3. Step 3: Cross multiply
    39,915.10x = 59,872.64 × 13,619.84
  4. Step 4: Simplify right side
    39,915.10x = 815,455,777.18
  5. Step 5: Solve for x
    x = 815,455,777.18/39,915.10
  6. Step 6: Final answer
    x = 20,429.76

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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.