Home / 21,388.28-29,515.29-11,828.70

Finding the Fourth Proportional to 21,388.28, 29,515.29 and 11,828.70

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Solution

The fourth proportional to 21,388.28, 29,515.29 and 11,828.70 is: 16,323.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.28 : 29,515.29 = 11,828.70 : x
  2. Step 2: Convert to fraction form
    21,388.28/29,515.29 = 11,828.70/x
  3. Step 3: Cross multiply
    21,388.28x = 29,515.29 × 11,828.70
  4. Step 4: Simplify right side
    21,388.28x = 349,127,466.47
  5. Step 5: Solve for x
    x = 349,127,466.47/21,388.28
  6. Step 6: Final answer
    x = 16,323.31

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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.