Home / 21,239.28-29,307.96-12,285.36

Finding the Fourth Proportional to 21,239.28, 29,307.96 and 12,285.36

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Solution

The fourth proportional to 21,239.28, 29,307.96 and 12,285.36 is: 16,952.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.28 : 29,307.96 = 12,285.36 : x
  2. Step 2: Convert to fraction form
    21,239.28/29,307.96 = 12,285.36/x
  3. Step 3: Cross multiply
    21,239.28x = 29,307.96 × 12,285.36
  4. Step 4: Simplify right side
    21,239.28x = 360,058,839.47
  5. Step 5: Solve for x
    x = 360,058,839.47/21,239.28
  6. Step 6: Final answer
    x = 16,952.50

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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.