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Finding the Fourth Proportional to 21,010.98, 28,994.10 and 12,058.25

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Solution

The fourth proportional to 21,010.98, 28,994.10 and 12,058.25 is: 16,639.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.98 : 28,994.10 = 12,058.25 : x
  2. Step 2: Convert to fraction form
    21,010.98/28,994.10 = 12,058.25/x
  3. Step 3: Cross multiply
    21,010.98x = 28,994.10 × 12,058.25
  4. Step 4: Simplify right side
    21,010.98x = 349,617,961.35
  5. Step 5: Solve for x
    x = 349,617,961.35/21,010.98
  6. Step 6: Final answer
    x = 16,639.77

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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.