Home / 13,424.45-18,534.99-8,390.93

Finding the Fourth Proportional to 13,424.45, 18,534.99 and 8,390.93

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Solution

The fourth proportional to 13,424.45, 18,534.99 and 8,390.93 is: 11,585.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.45 : 18,534.99 = 8,390.93 : x
  2. Step 2: Convert to fraction form
    13,424.45/18,534.99 = 8,390.93/x
  3. Step 3: Cross multiply
    13,424.45x = 18,534.99 × 8,390.93
  4. Step 4: Simplify right side
    13,424.45x = 155,525,710.97
  5. Step 5: Solve for x
    x = 155,525,710.97/13,424.45
  6. Step 6: Final answer
    x = 11,585.26

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1.5x scale

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.