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Finding the Fourth Proportional to 15,883.69, 21,919.60 and 8,810.23

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Solution

The fourth proportional to 15,883.69, 21,919.60 and 8,810.23 is: 12,158.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,883.69 : 21,919.60 = 8,810.23 : x
  2. Step 2: Convert to fraction form
    15,883.69/21,919.60 = 8,810.23/x
  3. Step 3: Cross multiply
    15,883.69x = 21,919.60 × 8,810.23
  4. Step 4: Simplify right side
    15,883.69x = 193,116,717.51
  5. Step 5: Solve for x
    x = 193,116,717.51/15,883.69
  6. Step 6: Final answer
    x = 12,158.18

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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.