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Finding the Fourth Proportional to 21,365.70, 29,484.18 and 11,934.24

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Solution

The fourth proportional to 21,365.70, 29,484.18 and 11,934.24 is: 16,468.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.70 : 29,484.18 = 11,934.24 : x
  2. Step 2: Convert to fraction form
    21,365.70/29,484.18 = 11,934.24/x
  3. Step 3: Cross multiply
    21,365.70x = 29,484.18 × 11,934.24
  4. Step 4: Simplify right side
    21,365.70x = 351,871,280.32
  5. Step 5: Solve for x
    x = 351,871,280.32/21,365.70
  6. Step 6: Final answer
    x = 16,468.98

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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.