Home / 22,890.79-31,585.64-12,819.65

Finding the Fourth Proportional to 22,890.79, 31,585.64 and 12,819.65

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Solution

The fourth proportional to 22,890.79, 31,585.64 and 12,819.65 is: 17,689.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,890.79 : 31,585.64 = 12,819.65 : x
  2. Step 2: Convert to fraction form
    22,890.79/31,585.64 = 12,819.65/x
  3. Step 3: Cross multiply
    22,890.79x = 31,585.64 × 12,819.65
  4. Step 4: Simplify right side
    22,890.79x = 404,916,864.69
  5. Step 5: Solve for x
    x = 404,916,864.69/22,890.79
  6. Step 6: Final answer
    x = 17,689.08

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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.