Home / 13,812.90-19,068.28-8,145.86

Finding the Fourth Proportional to 13,812.90, 19,068.28 and 8,145.86

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Solution

The fourth proportional to 13,812.90, 19,068.28 and 8,145.86 is: 11,245.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.90 : 19,068.28 = 8,145.86 : x
  2. Step 2: Convert to fraction form
    13,812.90/19,068.28 = 8,145.86/x
  3. Step 3: Cross multiply
    13,812.90x = 19,068.28 × 8,145.86
  4. Step 4: Simplify right side
    13,812.90x = 155,327,539.32
  5. Step 5: Solve for x
    x = 155,327,539.32/13,812.90
  6. Step 6: Final answer
    x = 11,245.11

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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.