Home / 39,905.40-59,858.10-13,639.80

Finding the Fourth Proportional to 39,905.40, 59,858.10 and 13,639.80

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Solution

The fourth proportional to 39,905.40, 59,858.10 and 13,639.80 is: 20,459.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,905.40 : 59,858.10 = 13,639.80 : x
  2. Step 2: Convert to fraction form
    39,905.40/59,858.10 = 13,639.80/x
  3. Step 3: Cross multiply
    39,905.40x = 59,858.10 × 13,639.80
  4. Step 4: Simplify right side
    39,905.40x = 816,452,512.38
  5. Step 5: Solve for x
    x = 816,452,512.38/39,905.40
  6. Step 6: Final answer
    x = 20,459.70

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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.