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Finding the Fourth Proportional to 21,010.68, 28,992.06 and 12,058.56

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Solution

The fourth proportional to 21,010.68, 28,992.06 and 12,058.56 is: 16,639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.68 : 28,992.06 = 12,058.56 : x
  2. Step 2: Convert to fraction form
    21,010.68/28,992.06 = 12,058.56/x
  3. Step 3: Cross multiply
    21,010.68x = 28,992.06 × 12,058.56
  4. Step 4: Simplify right side
    21,010.68x = 349,602,495.03
  5. Step 5: Solve for x
    x = 349,602,495.03/21,010.68
  6. Step 6: Final answer
    x = 16,639.28

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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.