Home / 15,493.51-21,381.05-8,419.91

Finding the Fourth Proportional to 15,493.51, 21,381.05 and 8,419.91

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Solution

The fourth proportional to 15,493.51, 21,381.05 and 8,419.91 is: 11,619.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.51 : 21,381.05 = 8,419.91 : x
  2. Step 2: Convert to fraction form
    15,493.51/21,381.05 = 8,419.91/x
  3. Step 3: Cross multiply
    15,493.51x = 21,381.05 × 8,419.91
  4. Step 4: Simplify right side
    15,493.51x = 180,026,474.61
  5. Step 5: Solve for x
    x = 180,026,474.61/15,493.51
  6. Step 6: Final answer
    x = 11,619.48

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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.