Home / 6,478.49-9,667.20-5,780.36

Finding the Fourth Proportional to 6,478.49, 9,667.20 and 5,780.36

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Solution

The fourth proportional to 6,478.49, 9,667.20 and 5,780.36 is: 8,625.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,478.49 : 9,667.20 = 5,780.36 : x
  2. Step 2: Convert to fraction form
    6,478.49/9,667.20 = 5,780.36/x
  3. Step 3: Cross multiply
    6,478.49x = 9,667.20 × 5,780.36
  4. Step 4: Simplify right side
    6,478.49x = 55,879,909.52
  5. Step 5: Solve for x
    x = 55,879,909.52/6,478.49
  6. Step 6: Final answer
    x = 8,625.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.