Home / 20,717.64-31,066.20-8,869.68

Finding the Fourth Proportional to 20,717.64, 31,066.20 and 8,869.68

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Solution

The fourth proportional to 20,717.64, 31,066.20 and 8,869.68 is: 13,300.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.64 : 31,066.20 = 8,869.68 : x
  2. Step 2: Convert to fraction form
    20,717.64/31,066.20 = 8,869.68/x
  3. Step 3: Cross multiply
    20,717.64x = 31,066.20 × 8,869.68
  4. Step 4: Simplify right side
    20,717.64x = 275,547,252.82
  5. Step 5: Solve for x
    x = 275,547,252.82/20,717.64
  6. Step 6: Final answer
    x = 13,300.13

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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.