Home / 13,328.40-19,979.80-10,365.20

Finding the Fourth Proportional to 13,328.40, 19,979.80 and 10,365.20

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Solution

The fourth proportional to 13,328.40, 19,979.80 and 10,365.20 is: 15,537.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.40 : 19,979.80 = 10,365.20 : x
  2. Step 2: Convert to fraction form
    13,328.40/19,979.80 = 10,365.20/x
  3. Step 3: Cross multiply
    13,328.40x = 19,979.80 × 10,365.20
  4. Step 4: Simplify right side
    13,328.40x = 207,094,622.96
  5. Step 5: Solve for x
    x = 207,094,622.96/13,328.40
  6. Step 6: Final answer
    x = 15,537.85

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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.