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Finding the Fourth Proportional to 21,374.92, 29,484.30 and 13,808.98

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Solution

The fourth proportional to 21,374.92, 29,484.30 and 13,808.98 is: 19,047.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,374.92 : 29,484.30 = 13,808.98 : x
  2. Step 2: Convert to fraction form
    21,374.92/29,484.30 = 13,808.98/x
  3. Step 3: Cross multiply
    21,374.92x = 29,484.30 × 13,808.98
  4. Step 4: Simplify right side
    21,374.92x = 407,148,109.01
  5. Step 5: Solve for x
    x = 407,148,109.01/21,374.92
  6. Step 6: Final answer
    x = 19,047.94

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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.