Home / 21,315.91-29,415.95-11,884.47

Finding the Fourth Proportional to 21,315.91, 29,415.95 and 11,884.47

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Solution

The fourth proportional to 21,315.91, 29,415.95 and 11,884.47 is: 16,400.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.91 : 29,415.95 = 11,884.47 : x
  2. Step 2: Convert to fraction form
    21,315.91/29,415.95 = 11,884.47/x
  3. Step 3: Cross multiply
    21,315.91x = 29,415.95 × 11,884.47
  4. Step 4: Simplify right side
    21,315.91x = 349,592,975.30
  5. Step 5: Solve for x
    x = 349,592,975.30/21,315.91
  6. Step 6: Final answer
    x = 16,400.57

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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.