Home / 21,530.89-29,712.98-11,840.76

Finding the Fourth Proportional to 21,530.89, 29,712.98 and 11,840.76

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Solution

The fourth proportional to 21,530.89, 29,712.98 and 11,840.76 is: 16,340.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.89 : 29,712.98 = 11,840.76 : x
  2. Step 2: Convert to fraction form
    21,530.89/29,712.98 = 11,840.76/x
  3. Step 3: Cross multiply
    21,530.89x = 29,712.98 × 11,840.76
  4. Step 4: Simplify right side
    21,530.89x = 351,824,265.06
  5. Step 5: Solve for x
    x = 351,824,265.06/21,530.89
  6. Step 6: Final answer
    x = 16,340.44

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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.