Home / 25,638.40-38,428.80-13,153.60

Finding the Fourth Proportional to 25,638.40, 38,428.80 and 13,153.60

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Solution

The fourth proportional to 25,638.40, 38,428.80 and 13,153.60 is: 19,715.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,638.40 : 38,428.80 = 13,153.60 : x
  2. Step 2: Convert to fraction form
    25,638.40/38,428.80 = 13,153.60/x
  3. Step 3: Cross multiply
    25,638.40x = 38,428.80 × 13,153.60
  4. Step 4: Simplify right side
    25,638.40x = 505,477,063.68
  5. Step 5: Solve for x
    x = 505,477,063.68/25,638.40
  6. Step 6: Final answer
    x = 19,715.62

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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.