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Finding the Fourth Proportional to 21,407.57, 29,541.98 and 11,716.98

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Solution

The fourth proportional to 21,407.57, 29,541.98 and 11,716.98 is: 16,169.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.57 : 29,541.98 = 11,716.98 : x
  2. Step 2: Convert to fraction form
    21,407.57/29,541.98 = 11,716.98/x
  3. Step 3: Cross multiply
    21,407.57x = 29,541.98 × 11,716.98
  4. Step 4: Simplify right side
    21,407.57x = 346,142,895.47
  5. Step 5: Solve for x
    x = 346,142,895.47/21,407.57
  6. Step 6: Final answer
    x = 16,169.18

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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.