Home / 13,420.47-18,510.61-8,314.33

Finding the Fourth Proportional to 13,420.47, 18,510.61 and 8,314.33

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Solution

The fourth proportional to 13,420.47, 18,510.61 and 8,314.33 is: 11,467.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.47 : 18,510.61 = 8,314.33 : x
  2. Step 2: Convert to fraction form
    13,420.47/18,510.61 = 8,314.33/x
  3. Step 3: Cross multiply
    13,420.47x = 18,510.61 × 8,314.33
  4. Step 4: Simplify right side
    13,420.47x = 153,903,320.04
  5. Step 5: Solve for x
    x = 153,903,320.04/13,420.47
  6. Step 6: Final answer
    x = 11,467.80

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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.