Home / 20,547.19-28,355.11-11,115.73

Finding the Fourth Proportional to 20,547.19, 28,355.11 and 11,115.73

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Solution

The fourth proportional to 20,547.19, 28,355.11 and 11,115.73 is: 15,339.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.19 : 28,355.11 = 11,115.73 : x
  2. Step 2: Convert to fraction form
    20,547.19/28,355.11 = 11,115.73/x
  3. Step 3: Cross multiply
    20,547.19x = 28,355.11 × 11,115.73
  4. Step 4: Simplify right side
    20,547.19x = 315,187,746.88
  5. Step 5: Solve for x
    x = 315,187,746.88/20,547.19
  6. Step 6: Final answer
    x = 15,339.70

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Half scale
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Double scale
Find fourth proportional to 20,548.19, 28,356.49 and 11,116.73
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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.