Home / 21,158.64-29,199.93-11,727.21

Finding the Fourth Proportional to 21,158.64, 29,199.93 and 11,727.21

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Solution

The fourth proportional to 21,158.64, 29,199.93 and 11,727.21 is: 16,184.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.64 : 29,199.93 = 11,727.21 : x
  2. Step 2: Convert to fraction form
    21,158.64/29,199.93 = 11,727.21/x
  3. Step 3: Cross multiply
    21,158.64x = 29,199.93 × 11,727.21
  4. Step 4: Simplify right side
    21,158.64x = 342,433,711.10
  5. Step 5: Solve for x
    x = 342,433,711.10/21,158.64
  6. Step 6: Final answer
    x = 16,184.11

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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.