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Finding the Fourth Proportional to 8,569.79, 12,858.93 and 5,790.36

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Solution

The fourth proportional to 8,569.79, 12,858.93 and 5,790.36 is: 8,688.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,569.79 : 12,858.93 = 5,790.36 : x
  2. Step 2: Convert to fraction form
    8,569.79/12,858.93 = 5,790.36/x
  3. Step 3: Cross multiply
    8,569.79x = 12,858.93 × 5,790.36
  4. Step 4: Simplify right side
    8,569.79x = 74,457,833.91
  5. Step 5: Solve for x
    x = 74,457,833.91/8,569.79
  6. Step 6: Final answer
    x = 8,688.41

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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.