Home / 13,140.16-19,724.80-5,354.40

Finding the Fourth Proportional to 13,140.16, 19,724.80 and 5,354.40

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Solution

The fourth proportional to 13,140.16, 19,724.80 and 5,354.40 is: 8,037.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.16 : 19,724.80 = 5,354.40 : x
  2. Step 2: Convert to fraction form
    13,140.16/19,724.80 = 5,354.40/x
  3. Step 3: Cross multiply
    13,140.16x = 19,724.80 × 5,354.40
  4. Step 4: Simplify right side
    13,140.16x = 105,614,469.12
  5. Step 5: Solve for x
    x = 105,614,469.12/13,140.16
  6. Step 6: Final answer
    x = 8,037.53

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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.