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Finding the Fourth Proportional to 21,362.27, 29,477.95 and 12,409.65

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Solution

The fourth proportional to 21,362.27, 29,477.95 and 12,409.65 is: 17,124.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,362.27 : 29,477.95 = 12,409.65 : x
  2. Step 2: Convert to fraction form
    21,362.27/29,477.95 = 12,409.65/x
  3. Step 3: Cross multiply
    21,362.27x = 29,477.95 × 12,409.65
  4. Step 4: Simplify right side
    21,362.27x = 365,811,011.19
  5. Step 5: Solve for x
    x = 365,811,011.19/21,362.27
  6. Step 6: Final answer
    x = 17,124.16

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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.