Home / 13,411.02-18,513.87-8,378.03

Finding the Fourth Proportional to 13,411.02, 18,513.87 and 8,378.03

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Solution

The fourth proportional to 13,411.02, 18,513.87 and 8,378.03 is: 11,565.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.02 : 18,513.87 = 8,378.03 : x
  2. Step 2: Convert to fraction form
    13,411.02/18,513.87 = 8,378.03/x
  3. Step 3: Cross multiply
    13,411.02x = 18,513.87 × 8,378.03
  4. Step 4: Simplify right side
    13,411.02x = 155,109,773.14
  5. Step 5: Solve for x
    x = 155,109,773.14/13,411.02
  6. Step 6: Final answer
    x = 11,565.85

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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.