Home / 21,315.54-29,415.48-11,884.70

Finding the Fourth Proportional to 21,315.54, 29,415.48 and 11,884.70

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Solution

The fourth proportional to 21,315.54, 29,415.48 and 11,884.70 is: 16,400.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.54 : 29,415.48 = 11,884.70 : x
  2. Step 2: Convert to fraction form
    21,315.54/29,415.48 = 11,884.70/x
  3. Step 3: Cross multiply
    21,315.54x = 29,415.48 × 11,884.70
  4. Step 4: Simplify right side
    21,315.54x = 349,594,155.16
  5. Step 5: Solve for x
    x = 349,594,155.16/21,315.54
  6. Step 6: Final answer
    x = 16,400.91

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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.