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Finding the Fourth Proportional to 21,365.93, 29,478.44 and 12,411.72

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Solution

The fourth proportional to 21,365.93, 29,478.44 and 12,411.72 is: 17,124.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.93 : 29,478.44 = 12,411.72 : x
  2. Step 2: Convert to fraction form
    21,365.93/29,478.44 = 12,411.72/x
  3. Step 3: Cross multiply
    21,365.93x = 29,478.44 × 12,411.72
  4. Step 4: Simplify right side
    21,365.93x = 365,878,081.26
  5. Step 5: Solve for x
    x = 365,878,081.26/21,365.93
  6. Step 6: Final answer
    x = 17,124.37

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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.