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Finding the Fourth Proportional to 21,873.51, 32,809.12 and 12,386.48

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Solution

The fourth proportional to 21,873.51, 32,809.12 and 12,386.48 is: 18,579.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873.51 : 32,809.12 = 12,386.48 : x
  2. Step 2: Convert to fraction form
    21,873.51/32,809.12 = 12,386.48/x
  3. Step 3: Cross multiply
    21,873.51x = 32,809.12 × 12,386.48
  4. Step 4: Simplify right side
    21,873.51x = 406,389,508.70
  5. Step 5: Solve for x
    x = 406,389,508.70/21,873.51
  6. Step 6: Final answer
    x = 18,579.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.