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Finding the Fourth Proportional to 21,490.31, 29,656.63 and 12,058.88

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Solution

The fourth proportional to 21,490.31, 29,656.63 and 12,058.88 is: 16,641.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.31 : 29,656.63 = 12,058.88 : x
  2. Step 2: Convert to fraction form
    21,490.31/29,656.63 = 12,058.88/x
  3. Step 3: Cross multiply
    21,490.31x = 29,656.63 × 12,058.88
  4. Step 4: Simplify right side
    21,490.31x = 357,625,609.16
  5. Step 5: Solve for x
    x = 357,625,609.16/21,490.31
  6. Step 6: Final answer
    x = 16,641.25

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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.