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Finding the Fourth Proportional to 21,703.99, 29,955.87 and 12,754.39

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Solution

The fourth proportional to 21,703.99, 29,955.87 and 12,754.39 is: 17,603.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,703.99 : 29,955.87 = 12,754.39 : x
  2. Step 2: Convert to fraction form
    21,703.99/29,955.87 = 12,754.39/x
  3. Step 3: Cross multiply
    21,703.99x = 29,955.87 × 12,754.39
  4. Step 4: Simplify right side
    21,703.99x = 382,068,848.77
  5. Step 5: Solve for x
    x = 382,068,848.77/21,703.99
  6. Step 6: Final answer
    x = 17,603.62

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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.