Home / 15,387.64-21,236.11-8,673.90

Finding the Fourth Proportional to 15,387.64, 21,236.11 and 8,673.90

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Solution

The fourth proportional to 15,387.64, 21,236.11 and 8,673.90 is: 11,970.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.64 : 21,236.11 = 8,673.90 : x
  2. Step 2: Convert to fraction form
    15,387.64/21,236.11 = 8,673.90/x
  3. Step 3: Cross multiply
    15,387.64x = 21,236.11 × 8,673.90
  4. Step 4: Simplify right side
    15,387.64x = 184,199,894.53
  5. Step 5: Solve for x
    x = 184,199,894.53/15,387.64
  6. Step 6: Final answer
    x = 11,970.64

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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.