Home / 21,005.18-28,991.10-12,058.52

Finding the Fourth Proportional to 21,005.18, 28,991.10 and 12,058.52

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Solution

The fourth proportional to 21,005.18, 28,991.10 and 12,058.52 is: 16,643.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.18 : 28,991.10 = 12,058.52 : x
  2. Step 2: Convert to fraction form
    21,005.18/28,991.10 = 12,058.52/x
  3. Step 3: Cross multiply
    21,005.18x = 28,991.10 × 12,058.52
  4. Step 4: Simplify right side
    21,005.18x = 349,589,614.22
  5. Step 5: Solve for x
    x = 349,589,614.22/21,005.18
  6. Step 6: Final answer
    x = 16,643.02

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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.