Home / 18,911.40-28,508.71-17,642.76

Finding the Fourth Proportional to 18,911.40, 28,508.71 and 17,642.76

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Solution

The fourth proportional to 18,911.40, 28,508.71 and 17,642.76 is: 26,596.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.40 : 28,508.71 = 17,642.76 : x
  2. Step 2: Convert to fraction form
    18,911.40/28,508.71 = 17,642.76/x
  3. Step 3: Cross multiply
    18,911.40x = 28,508.71 × 17,642.76
  4. Step 4: Simplify right side
    18,911.40x = 502,972,328.44
  5. Step 5: Solve for x
    x = 502,972,328.44/18,911.40
  6. Step 6: Final answer
    x = 26,596.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.