Home / 13,539.28-20,307.36-3,678.40

Finding the Fourth Proportional to 13,539.28, 20,307.36 and 3,678.40

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Solution

The fourth proportional to 13,539.28, 20,307.36 and 3,678.40 is: 5,517.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.28 : 20,307.36 = 3,678.40 : x
  2. Step 2: Convert to fraction form
    13,539.28/20,307.36 = 3,678.40/x
  3. Step 3: Cross multiply
    13,539.28x = 20,307.36 × 3,678.40
  4. Step 4: Simplify right side
    13,539.28x = 74,698,593.02
  5. Step 5: Solve for x
    x = 74,698,593.02/13,539.28
  6. Step 6: Final answer
    x = 5,517.18

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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.