Home / 13,424.83-18,528.02-8,390.68

Finding the Fourth Proportional to 13,424.83, 18,528.02 and 8,390.68

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Solution

The fourth proportional to 13,424.83, 18,528.02 and 8,390.68 is: 11,580.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.83 : 18,528.02 = 8,390.68 : x
  2. Step 2: Convert to fraction form
    13,424.83/18,528.02 = 8,390.68/x
  3. Step 3: Cross multiply
    13,424.83x = 18,528.02 × 8,390.68
  4. Step 4: Simplify right side
    13,424.83x = 155,462,644.90
  5. Step 5: Solve for x
    x = 155,462,644.90/13,424.83
  6. Step 6: Final answer
    x = 11,580.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.