Home / 15,493.48-21,381.12-8,419.93

Finding the Fourth Proportional to 15,493.48, 21,381.12 and 8,419.93

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Solution

The fourth proportional to 15,493.48, 21,381.12 and 8,419.93 is: 11,619.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.48 : 21,381.12 = 8,419.93 : x
  2. Step 2: Convert to fraction form
    15,493.48/21,381.12 = 8,419.93/x
  3. Step 3: Cross multiply
    15,493.48x = 21,381.12 × 8,419.93
  4. Step 4: Simplify right side
    15,493.48x = 180,027,533.72
  5. Step 5: Solve for x
    x = 180,027,533.72/15,493.48
  6. Step 6: Final answer
    x = 11,619.57

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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.