Home / 15,405.59-21,259.65-8,691.22

Finding the Fourth Proportional to 15,405.59, 21,259.65 and 8,691.22

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Solution

The fourth proportional to 15,405.59, 21,259.65 and 8,691.22 is: 11,993.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.59 : 21,259.65 = 8,691.22 : x
  2. Step 2: Convert to fraction form
    15,405.59/21,259.65 = 8,691.22/x
  3. Step 3: Cross multiply
    15,405.59x = 21,259.65 × 8,691.22
  4. Step 4: Simplify right side
    15,405.59x = 184,772,354.44
  5. Step 5: Solve for x
    x = 184,772,354.44/15,405.59
  6. Step 6: Final answer
    x = 11,993.85

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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.