Home / 28,689.90-39,560.16-19,616.76

Finding the Fourth Proportional to 28,689.90, 39,560.16 and 19,616.76

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Solution

The fourth proportional to 28,689.90, 39,560.16 and 19,616.76 is: 27,049.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.90 : 39,560.16 = 19,616.76 : x
  2. Step 2: Convert to fraction form
    28,689.90/39,560.16 = 19,616.76/x
  3. Step 3: Cross multiply
    28,689.90x = 39,560.16 × 19,616.76
  4. Step 4: Simplify right side
    28,689.90x = 776,042,164.28
  5. Step 5: Solve for x
    x = 776,042,164.28/28,689.90
  6. Step 6: Final answer
    x = 27,049.32

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Half scale
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Double scale
Find fourth proportional to 28,690.90, 39,561.54 and 19,617.76
Similar ratio
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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.