Home / 8,931.20-13,396.25-3,999.51

Finding the Fourth Proportional to 8,931.20, 13,396.25 and 3,999.51

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Solution

The fourth proportional to 8,931.20, 13,396.25 and 3,999.51 is: 5,999.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.20 : 13,396.25 = 3,999.51 : x
  2. Step 2: Convert to fraction form
    8,931.20/13,396.25 = 3,999.51/x
  3. Step 3: Cross multiply
    8,931.20x = 13,396.25 × 3,999.51
  4. Step 4: Simplify right side
    8,931.20x = 53,578,445.84
  5. Step 5: Solve for x
    x = 53,578,445.84/8,931.20
  6. Step 6: Final answer
    x = 5,999.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.