Home / 21,115.04-29,139.36-11,684.48

Finding the Fourth Proportional to 21,115.04, 29,139.36 and 11,684.48

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Solution

The fourth proportional to 21,115.04, 29,139.36 and 11,684.48 is: 16,124.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.04 : 29,139.36 = 11,684.48 : x
  2. Step 2: Convert to fraction form
    21,115.04/29,139.36 = 11,684.48/x
  3. Step 3: Cross multiply
    21,115.04x = 29,139.36 × 11,684.48
  4. Step 4: Simplify right side
    21,115.04x = 340,478,269.13
  5. Step 5: Solve for x
    x = 340,478,269.13/21,115.04
  6. Step 6: Final answer
    x = 16,124.92

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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.