Home / 21,398.75-29,529.72-11,838.99

Finding the Fourth Proportional to 21,398.75, 29,529.72 and 11,838.99

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Solution

The fourth proportional to 21,398.75, 29,529.72 and 11,838.99 is: 16,337.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.75 : 29,529.72 = 11,838.99 : x
  2. Step 2: Convert to fraction form
    21,398.75/29,529.72 = 11,838.99/x
  3. Step 3: Cross multiply
    21,398.75x = 29,529.72 × 11,838.99
  4. Step 4: Simplify right side
    21,398.75x = 349,602,059.78
  5. Step 5: Solve for x
    x = 349,602,059.78/21,398.75
  6. Step 6: Final answer
    x = 16,337.50

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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.