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Finding the Fourth Proportional to 6,486.29, 8,947.54 and 5,645.51

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Solution

The fourth proportional to 6,486.29, 8,947.54 and 5,645.51 is: 7,787.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,486.29 : 8,947.54 = 5,645.51 : x
  2. Step 2: Convert to fraction form
    6,486.29/8,947.54 = 5,645.51/x
  3. Step 3: Cross multiply
    6,486.29x = 8,947.54 × 5,645.51
  4. Step 4: Simplify right side
    6,486.29x = 50,513,426.55
  5. Step 5: Solve for x
    x = 50,513,426.55/6,486.29
  6. Step 6: Final answer
    x = 7,787.72

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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.