Home / 21,398.99-29,529.40-11,838.32

Finding the Fourth Proportional to 21,398.99, 29,529.40 and 11,838.32

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Solution

The fourth proportional to 21,398.99, 29,529.40 and 11,838.32 is: 16,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.99 : 29,529.40 = 11,838.32 : x
  2. Step 2: Convert to fraction form
    21,398.99/29,529.40 = 11,838.32/x
  3. Step 3: Cross multiply
    21,398.99x = 29,529.40 × 11,838.32
  4. Step 4: Simplify right side
    21,398.99x = 349,578,486.61
  5. Step 5: Solve for x
    x = 349,578,486.61/21,398.99
  6. Step 6: Final answer
    x = 16,336.21

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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.