Home / 20,885.13-28,821.13-11,810.35

Finding the Fourth Proportional to 20,885.13, 28,821.13 and 11,810.35

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Solution

The fourth proportional to 20,885.13, 28,821.13 and 11,810.35 is: 16,298.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.13 : 28,821.13 = 11,810.35 : x
  2. Step 2: Convert to fraction form
    20,885.13/28,821.13 = 11,810.35/x
  3. Step 3: Cross multiply
    20,885.13x = 28,821.13 × 11,810.35
  4. Step 4: Simplify right side
    20,885.13x = 340,387,531.12
  5. Step 5: Solve for x
    x = 340,387,531.12/20,885.13
  6. Step 6: Final answer
    x = 16,298.08

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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.