Home / 15,384.72-21,218.82-11,136.40

Finding the Fourth Proportional to 15,384.72, 21,218.82 and 11,136.40

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Solution

The fourth proportional to 15,384.72, 21,218.82 and 11,136.40 is: 15,359.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,384.72 : 21,218.82 = 11,136.40 : x
  2. Step 2: Convert to fraction form
    15,384.72/21,218.82 = 11,136.40/x
  3. Step 3: Cross multiply
    15,384.72x = 21,218.82 × 11,136.40
  4. Step 4: Simplify right side
    15,384.72x = 236,301,267.05
  5. Step 5: Solve for x
    x = 236,301,267.05/15,384.72
  6. Step 6: Final answer
    x = 15,359.48

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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.